解一元一次方程专项练习题(200题-有答案).docx
元一次方程专项练习200题(附答案)3Z<5rP"I(14)20%X-2.43=0.8,(3)-4×=-,46(4)8×2.5-2x=73.6(15)-4=42,32(5)0.78:x=3:5,(16)0.6×+3×2.5=67.5,(6)120%X=O.4,(77)(8)(78)X2.25=8.25,(9)(77)X25%x=24,(70)9×31.7×=13.4,7÷(X)=6'9.(79)曾:攵=3:12,42xWx=7.2,5管(X-0.45)吗,(20)x+0.8=5.6-(25)L+Nx=E,236(36)16+8x=40,(26)X:42哼10,(37)X春77=3,(27)-l×0.5+A=§弓(38)l+2x=l,42(28)0.8:-=0.48:12(39)卫37x=1.04,10(29)(30)42:W=X至57(37)5×0,4=75%,(56)150%x+66=99(57) x+6 0.8x=16(46) -1:-I=X:0.8,2052 工(58)34(47) X÷卫=至+7,46(48) 725%X+25%x=2+25%4X»1.25-X,0.25L6(49)F4×1 (50)(60)3-÷(X3)=7316'I(67)(X+0.5):21=(X-4).:1;24(57)5:8=x:32>(52)2×+3×0.9=24.9,(53)5.3x2.9点5(62)X÷O.05=3.528»11.5X+X=203.8×12+15X=87.6(78)4÷X=2,6(68)6X+5=17,(69)0.6×(2.5+X)=4.2,(80)宜:78%=",9.(X4.52x=-9.(87)(70)32_丫一一八815(77)10_5_y22,27a18X45(82)3+卫x=46,(72)314InXis73)收会崇(74)(79)8(x2)=2(x+7),(98)4x+2(8x)=26,(88)3(x+4.5)=60,(89)1.6x+2.4=7.52,(100)-+-×=1,55(101)x×(1+-)='3RIg(90)3(x0.8)=6.3,(702)S,(9/)28.45x=5.8,(92)x:1=A62R(93)l+2x=-l>22(94)J-÷=15%,20(96)x+50%x=6,(703)(Iq)x=28,no),.R(722)x0.8x6=76,(777)637.8X=7.2,2)×=i(123)1:&x:8,33(113)x÷E=42,14(724)°015=x,0.。6(774)Ex+工=U,R52。(725)x:75=W:/,q6(775) 7x÷3=8.19,(116) 12:0.6=×:工,2(117) 3(x+2)=4(x+1),139)2,(140)36(737)24,9.(729)2.5+7W=3W,76×7+3x=69,128)1(141)6x+2x56=0,8.53x=21,23x0.454=2.7£(142)5.8x4.6x=0.96,(132)3至÷x=4,6(133) -5%=17.54,4(134) .1:2=1:(4273x)'(143)8,4÷(9x)=3(144)3x÷7.2=8,(135)6×+31=49>(145)5x+28=71,(136)7x3=8.19,(137)32.89x=17.5(138)x-0.36×=16»-.(146)8.71.2x=3.9>(765)1.9x=5.7(753)7.83x=3.6,(754)6×31.8x=7.2,(755)10:x=4.5:0.8,(166)4.3y-y=4.6,(167)5x+2,6=7.6,(168)X-7.5=72.9,(156) :=x:»(169) 9×+5×=8.4,4810(157) X7.65=464,(158) 28.25 X=8.25,(170) 6.8+3.2x=74.8,(159) X (3.6+2.97)=12.42,( 777 )5射喏,(187) 4x 3 (20 %+4=0,(189) 4x(178) - -x= A ,E m 13(190) 8x(788)平 a!5×6=12 ,3x=15.6,(191) 30× (x÷4) =60,(779)2÷75%=3,3(180) 4x-y×14=2.4,(181) W : x=2 : 4.5,95(192) 7.2×0.5 3x=1.2 ».(793) 5x 2,4×5=8,(182) (x-45)×6=12.5»(183) 2717x=13.4,(784)9.6+3x=3.24×5,(785)2x+5=5x7,(795)5x2.4×15=66,(796)3.2x+2.8xx=1,3x=6.3,(200) x÷0.7+0.9×3=4,U-4,217-Lj×21=×21»217X=/2;3 3)-4×=-»46受4x+4J+4x,4 6X(2-W)=1.2x=7.2,x÷=.2÷,555X=1;工4=4x+4,12(4) 8×2.52x=73.6202x=73.6,13.6+2X=20,2X=6.4,x=3.2;(5) 0.78:x=3:5,3x=0.78×5,3x=3.9,X=1.3(6) 120%x=0.4,120%x+20%x=0.4+20%X,0.4+20%X=7,0.4+20%X0.4=10.4,20%x=0.6,20%XX典=0.6X幽,29.0x=3;(10) 9×31.7x=13.4,271.7x=13.4,271.7x+1.7x=13.4+1.7x,734+7.7x=27,13.4+1.7x13.4=2713.4,1.7x13.6,77x÷7.7=736÷77,x=8(11) X25%x=24,乃%x=24,7员x5%=24+75%,x=32;(72)-*+02=J,卫X-4卫X-43.0.6J,20.6+0.6=1+0.6,对卫X二皂,4m11÷3,W4x=23)20% X 7.2+7.2=0.8+7.2 ,20% x÷20% =8÷20%, x=40 ;X 2.4×3=0.8,X- 7.2=0.8,3) 0.6x+90第1.5x78,/.5x÷t5=78÷L5,x=52 ;(争-x=42 ,23x=×12, 43x÷3=9÷3 ,x=3.i÷.l=42÷l,6 6 x=2527.5,l÷l=4÷l ,333L 34(18) X2.25=8.25,X- 2.25+2.25=8.25+2.25,x=7O.5 ;V喏:x=3 : 72,5,W) =24, 色=24 ,(22) XX (2-XX(25)7,(26) X : 42=5:*42,(16)0.6x+3×2,5=67.5,0.67,567.5,O.6x+757.5=67.50.6x=60»0.6x÷O.6=6O÷O.6,x=1OO;(17)也÷(X-0.45)=53-÷(X-0.45)×(x-0.45)=(X-53心45)»X-2.4=1.6»"X-壬.4+2.4=1.6+2.4,3-1=4,3(20) x+0.=5.6,卫x+0.80.8=5.650.8,-x=4.8,63.×=4.8×-,63x=8(21) 1,4:X=1:075,x=1.4×0.75,X=1.056×-÷-=24÷-,x=20;(23) 4×卫二34,444×+=3+,?,4444x=4»4x÷4=4÷4,X=1(24) 12×+7×0.3=20.1,12x+2.1=20.11A72x+2.72.1=20,12,12x÷12=18÷12,x=7.5;12±+±=9.*37-x×610x=42×-,710×÷10=30÷10,x=35,27)UXo.5+0.75+l=3.75,20.75+40.75=3.75x=6;(28)0.8:工0.48:X,120.8x=-×0.48,120.8x=0.2,0.8x÷0.8=0.2÷0.8x4(29)X-2X=国,R533)2(X-3)=58,2(X3)÷2=5,8÷2X-3=2.9,X-3+3=2.9+3,x=5.9;(34)1.6x=6.4,1.6x÷1.6=6.4÷1.6,x=4;(35)4×3×9=29,4×27=29,4x27+27=29+27,4x=56,4x÷4=56÷4,X=74;(36)16+8x=40»16+8×16=4016,8×=24»8x÷8=24÷8,x=3;(37)x÷1.13»x1,1×1.1=3×1.1,x=3.34*,554二2一,5'R5,Ex=3;(38)-l+2x=l,1.(30)42:1X至A57=42×-,÷r30÷x=50;(37)5x0,4=75%,5x0.4+0.4=75%+0.4,5x÷5=7.75÷5,x=0.23(32)6x6×0.9=4.5,0.9+0.9=45+0.9,6x=5.4,6x÷6=5.4÷6,×=0.9;2x=-,42x÷2=l÷2,4-l(39)忠X3-12.762J67x1.127x=1.04,(40)X-7x=1.04,L04=1.041.04,7x=0,7x÷7=7.72÷7、x=0.16;1L=2.31=2,X-1+1=2+1,囚x=3»16x=-;19(43)卫二°26,79.42.4x=72×0.26,2.4x=18,72,24x÷2.4=78.72÷2.4,x=7.8;1 25%X+25%J+25%x,40.25x+0.250.25=7-0.25,0.25x=0.75,x=3;1.25=X,0.25TTfi(49)0.25x=1.25×1.6,025x+025=7257.6÷025,x=8;JXX=JLXJ,425(50)(44)1,2:2=×,35x=7.2×5»3Z=6,3X=9;(45)1三=A:A111152×=18×,,_15IOX=JJ,x=图;6(57) 5:8=x:32,8x=5×32,8x÷8=532÷8,x=20(58) 2×+3×0.9=24.92x+2.7=24.91、2x+2.72.7=24.92x÷2=22.2÷2,kx=11.1;(59) 53x>2.9X=W,X=12;2.4x÷2.4=W÷24,.6(46)工:I=X:0.8,2。5X=-Lx0.8,÷得=。.04,-i'JX,OOX=O.2;(54)c(7-(7-2.8x)2.8x)=1.5D/42.4x=-53=3号Y-I-,32.7,7-2.8x=2.7,72.8x+2,x=2.1+2.8x,7-2.1=2.1+2.8x2,1,150%x+66=991.5×66=991.5x=33x=22(57)x+60.8x=16O.2x+6=760.2×=10x=50x_x._(58)3T12x=12x=14.4(59)*5E0.55x=5.5x=10(60)3-÷(X心)=1.3m63-i÷(X至)X(x-卫)=1.3×(x-3-l=l.3-0.78,13-W.78=1,3x0.78+0.78,14.68=1.3x»4.68÷7.3=7.3x÷7.3,x=3.6;(67)(X+0.5):21=(X4):124(x+0.5)×-,4÷0.05×0.05×X=O.17(X=52;(64)4x4.53X=6.38,183X=6.38,183X+3X=6.38+3X,6.38+3X=78,2.5+x 2.5=7 2.5,x=4.5 ;6.38+3X6.38=186.38,3X11.62,3X÷3=11.62÷3,X=581.7r11,(65) 4X7.2=10,4X7.2+7.2=70+7.2,4X=17.2,4X+4=77.2÷4,X=4.3;(66) 77.5X+X=2O,12.5X=20,72.5X÷72.5=2O÷72.5,X=1.6;(67) 3,8×12+15X=87.6,45.6+15X=87.6,45.6+15X45.6=87.645.6,15X=42,75X+75=42÷75,X=2.8(68) 6X+5=17,6x+5-5=175,6x÷6=72÷6,x=2;(69) 0.6×(2.5+X)=4.2,0.6×(2.5+X)÷0.6=4.2÷0.6,2.5+x=7,0.6-_Lx22,IOu27xR1WX型乂出,27X1p110x一;一(72)l-AJJIOx15X=111.1升y1f同XX有,(73)To-M=X-3163.45,x.4x÷-×-×,551452X巧(74) 4(W+x)=竺,65-L+4x=-,55l+4x-理=竺-l,554x=4,X=1;(75) WXO.25+4=乜,R240.2+X=-»240.2+-Ix-0.2=&9.40.2,1.U./220(77)200:6=x:12,56x=2OO×12,56x÷6=480÷6»x=80(78)4÷X=2,K4+XxX=2X,2ENX=4,5Z÷2=4÷2,E6X=IO;(79)8(X2)=2(x+7),8X6X16=2X+14,16=14,6X=30,X=5;(SO)4A:18%=,巩X=0.18x6.5,驾e20X=7.84.5(87)2x=-»2旦-2x+2i+2x2.l+2x-if25,5(82)2立,N12x÷2=-l÷2,,1X=C;'9.(&+3x=46,韶46,18x3=64,18x3+3=64+3»18x=67»78x÷78=67÷78,y_67(87)8(2X7)=5(X+716x56=5x+65316x565x=5x+6511x56=65,11x56+56=65+56,IlX=I21,11x÷11=12U11,第嘲=46嘴x=40;(83):x=2:国,435x=77,(88)3(x+4.5)=60,3(x+4.5)÷3=60÷3,x+4.5=20,x+4.54.5=2045,X=75.5f=-2÷,2=-÷-2,3313X=(89)1.6x+2.4=7.52,1.6x+2.42.4=7.522.4,1.6x=5.12,7.6x÷7.6=5.72÷7.6,x=3.2;(84)I=id,Y1.6×=6.4×2,1.6x=12.8,7.6x÷7.6=72.8÷7.6,x=8(90)3(X-。8)=6.3;3x2.4=63,3x,2.4+2.4=6.3+2.4,>3x=8.7,3x÷3=8.7÷3,x=2.9;(85)5(3x4)-2(x-7)=5(2xD15x202x+2=10x5,13x18=10x5,13×1810×=10x510x,3x18=5,3x18+18=-5+78,3x=13,3x÷3=13÷3,(91)28.45x=5.8,28.45x+5x=5.8+5x»5.8+5x=28.4,5.8+5x5,8=28,45.8,5x=22.6,5x÷5=22.6÷5,x=4.52(92)X:1=第2Q页共34页52x=1;F2x=0;(94)-L÷=15%,23x×x=15%x,2÷0J5x=0J5,0.15xW.15=0.15÷0.15,x=1;(Iol)×(L2)=22,IlL22;1Q1R1Q111YX15_22x15,x=-,1516JLx.7J7,151615,IE(皿0-3心l-3x+3x=+3'或I1Il,9.21423÷3=a+3,44(105) X 吗二(96) x+50%×=6,1.5x=6,7.5x÷7.5=6÷75,x=4;(97) 三:×=O,3:12,40.3X=WXI2,40.3x÷0.3=9÷0.3,x=30;(98) 4x+2(8x)=26,4x+162×=26,2x+76=26,2x+1616=2616,2x÷2=1O÷2,x=57x=2855x×28×,x=20;(104)X21,,1.:7xi1441l7.(99) &0, V 3. 3_n. 3 .7x×=k/5x=6155x+35 35=650X 35,x=123 ;(107) 720÷3x=80,720÷3××3×=80×3x,x=3 ;240x=720,240x÷240=720÷240,×=3;(708)3.6×0.9x=8J,(3.60.9)x=8.1,2.7×8.1,2.7x÷2.7=8.7÷2.7,(109)4×4.53×=6,183x=6,183×+3×=6+3×,6+3x=18,6+3×6=186,3x=12,3x÷3=72+3,x=4(110)里”,.R2.5x=10×0.8,2.5x÷2.5=8÷2.5,x=3.2;(111)6×3-1.8X=7.2,181.8X=7.2,181.8X+1.8X=7.2+1.8X,7.2+L8X=18,7.2+1.8X7,2=187.2,1.8X=10.8,1.8X1,8=10.8÷1.8,X=6x=42×3x+6=4x+4 »3×+6 3x=4x+4 3x ,×+4=6 ,x+4 4=6 4x=2x=4R X=65(118)3x70%x=9.2,3x0.7x=9.2»2.3x=9.2,2.3x÷2.3=9.2÷2.3,(119)6+x=240,6+62406,(775)7x÷3=8.79,7x÷3×3=8.19×3,7x=24.577×724577x=390 2M2.5 0.4x=12.5 >22.5 0.4x+0.4x=72.5+0.4x12.5W.4x=22,5, J5÷0.4x 72.5=22.512.5,0.4×÷0.4=10÷0.4,x=25 ;(727)x:3.5=4:21,32-x=3.5×4,32J÷21=74÷21,333x=6(122)x0.8x6=16,0.2x6=76,O.2x6+6=16+6,02x÷0.2=22÷02,x=11O;(723)1:&:8,332×=8×A»-x×S×-l×-5,3232X=4;(724)°015=X,S06一20.06x=2×0.015,0.06x÷0.06=0.03+0.06x=O.5;(125)X:75=旦:1,96工X=75XW,6gx×6=15×-×6»69×=40;172411YXIlXl2,(128)1务二包,12+且X=卫+3耳4E4&+务=7,543+3y3.3,H45£3£24,43F3(729) 2.5+1x=3,372.5+1x-2.5=3旦-2.5,37(730) 3$22=4'3x-2-l÷21=4+2A»6"243鸟=61,.623至X+3昱61+3工»6626X-39-23(737)8.53x3,28.53x+3x=2-+3xL2-3x+21=8.5,23x+212-1=8.522%、3x=6,3x÷3=6÷3,2324(733)-5%=17.544解:务-5%+5%4=17.54+5%,X),解:4 TX= 44÷J=7.59÷,4422=2+J_2_,212122140.1«ly.1,21"22x=317(135)6×+31=49五6x+3731=4937,6x=18,6x÷6=78÷6,x=3;(136)7x÷3=8.19,7x÷3×3=8.19×3,7x=24.57,7x+7=24.57+7,x=3.51;(137)32.89x=17.5,32,89x+9x=17.5+9x,17.5+9x=32.8,9x=75.3,9x÷9=5.3÷9,17.5+9×17.5=32.877.5,0,640.64=16÷0.64,xAX诙,42+3x=69,42+3x42=6942,3x=27,3x÷3=27÷3,x=9;(140)6x+2X56=0,(6+2)X56+56=0+56,8×=56,8x÷8=56÷8»x=7(141) 3x0.45×4=2.7,3x1,8=2.7,3×1.8+1.8=2.7+1.8»3x=4.5»3x÷3=4.5÷3,x=1.5;(142) 5.8×4.6x=0.96,1.2×=0.96,7.2x÷7.2=O.96÷7.2,x=0.8:(143) 8.4÷(144) x)=3»9x=8,4÷3»9X28;(144)3x÷72=8,,3x÷1.2×1,2=8×1,2,3x=9.6,3x÷3=9.6÷3,x=3.2(145) 5x+28=77,5x+2828=7128弋T5x=43,.曰5x÷5=43÷5,一x=8.6;yr(146) 8.71.2x=3.9'、8.71.2×+1,2x3,9=3.9+1.2×3.9,4.8=1.2x»1.2x4.8,7.2x÷7.2=4.8÷7.2,x=4;(147) 8×2.6x=37.8,5.4x=37.8,JBB*4.一MXX=76.4,;(749)54÷2+3x=72,27+3x=72,27+3x27=7227,3x=45,3x÷3=45÷3,x=15;(150)8x2.637.8,8×2.6+2.6=37.8+2.6,8×=40.4»8x÷8=40.4÷8,x=5.05(757)L÷昱2,4一电151/1/×4=-×4,4121x=v4(752)x+30%x=26,(7+30%)x=26,1.3x=26,7.3x÷7.3=26÷73,x=20;(753)7.83x=3,6,7.83x+3x3.6+3x,3.6+3x=7.8,3.6+3x3,6=7.83.6»3x=4.2,3x÷3=4.2÷3,X=1.4(154)6×31.8×=7.2,181.8×=7.2,4.-16.910.8÷1.(155y10:x=4.5:0.8,4.5x=10×0.8,.5=8÷4,5»(156)1:l=x:A»10lx=l×A-,1.8t-X=,4IOxlx:A1=IX4X=(157) X7.65=4.64,X7.65+8.67=464+7.65,X=12.29;(158) 28.25X=8.25,28.25X+X=8.25+X,X+8.25=28.25,X+8.25825=28.258.25,X=2O;(159) X(3.6-2.97)=12.42,X6.57=12.42X6.57+6.57=72.42+6.57,X=18.99(760)÷x=卫,3R80% x=48, ).8) x=48,,0.2×=48, x÷0.2=48÷0.2×=240 ;(163 ) 75% x- 5x2=6,0.75X3=6,0.75×3+3=6+3,0.75x=9,0.75x÷0.75=9÷0.75,x=12(164)x6.8=15.4,x-6.8+6.8=15.4+6.8,x=22.2;(765)1.9x=5,7»79x÷7.9=5.7÷7.9,x=3:(766)4.3yy-4.6»3.3y=4.6,33y÷33=46÷33,4633(767)5x+2.6=7.6,5x+2.62.6=7.62,6,5x=5,5x÷5=5÷5,x=1(168)×-7.5=72.9,X1.5+1.5=12.9-7.5,x11.4;(169)9x+5x=8.4,14x=8.4,74x÷74=8.4÷74,6.8,3.2x=8,x=O.6;(170)6.8+3.2×=14.8,6.86.8+3.2x=14.821(175)X40%x=9,0.6x=9,O.6x÷O.6=9÷O.6,x=15;-÷U=J÷1,6666X=7.;(173)4.5×1-31x=7.5,39.1.53.5x=1.5>1.5-3.5x+3.5x=7.5+3.5X,1.5=1.5+3.5x»1.51.5=1.5+3.5x1.5,0=3.5x,0÷3.5=3.5x÷3.5,x=O(774)(7+25%)x=0.5,7.25x=Q5,1.25x÷1.25=0.5÷.25,×=0.4;(176)x×20%=15.2,x×20%÷20%=75.2÷2O%,x=763Ox30+30=780+30,30x=210,30x÷30=210÷30,x=7;(177)30x30=180;(7795争÷75%=3,x=2.2÷75%×75%4=3×75%,O(180)4x-×14=2.44x6=2.4,4x=2.4+6,x=8,4÷4,x=2.1(787)W:x=2:4.5,95x=4.5×-,59=2,5x=2×-,2x=5(785)2x+5=5x72x+52x=5x72x,3x7=5,3x7+7=5+7,_Y3x=12,3x+3=72÷3,×=4;(186)3(x-2)=25(x-2),3x6=125x,3×6+5x=125x+5x,8×6=12,8x6+6=12+6,8x=18,8x÷8=18÷8,x=2.25;(787)4x3(20x)+4=0,7×56=0,7×56+56=0+56,7x=56,7x÷7=56÷7;vx=8:(782)(X4.5)×6=12.5,6x4,5×6=12.5,6x27=12.5,6×27+27=72.5+27,6x=39.5,6×÷6=39.5÷6,(788、年空37,)乂24=124,x=6;12(183)2717x=13.4,2717×+17x=13.4+17x,13.4+17x=27,13.4+17x13.4=2713.4,6(y+2)4W3)=24,3。2y=24,302y+2y=*24+2y,2y+24=30,2y+2424=3024,,hs9)4x-2y=6»2y÷2=6,y=35×6=12,17x13.6,17x÷17=13.6÷17*4×30=12,4x30+3O=72+30,4x=42,