小学数学总复习：解方程专项练习200题附答案

--14.5+14.5=5.5+14.583.2x+3.2=8+3.2,x=2.5(171)10TP/X8=20X8,8x=1605-^-^Xx=9,x-1,ICixx-80%x=48,(1-0.8)x=48,0.2x=48,0.2xF.2=48+0.2,x=240;75%x-5X^=6,50.75x-3=6,

0.75x-3+3=6+3,

0.75x=9,

0.75x+0.75=9+0.75,

x=12x-6.8=15.4,x-6.8+6.8=15.4+6.8,x=22.2;5—x-idgiiliiix=21(172)孑y=559，1q21111x,x=1;x,(165)1.9x=5.7,

1.9x+1.9=5.7+1.9,

x=3;(173)4.5 -3t;x=1.5,(166)4.3y-y=4.6,3.3y=4.6,3.3y^3.3=4.6+3.3,46(167)5x+2.6=7.6,5x+2.6—2.6=7.6-2.6,5x=5,5x+5=5与,

x=11.5—3.5x=1.5,1.5-3.5x+3.5x=1.5+3.5x,1.5=1.5+3.5x,1.5-1.5=1.5+3.5x0=3.5x,0+3.5=3.5x+3.5,x=0(174)(1+25%)x=0.5,1.25x=0.5,1.25x-1.25=0.5+1.25,

x=0.4;1.5,x-1.5=12.9,x-1.5+1.5=12.9-1.5,x=11.4;9x+5x=8.4,14x=8.4,14x+14=8.4+14,x=0.6;6.8+3.2x=14.8,(175)x-40%x=9,

0.6x=9,

0.6xF.6=9+0.6,

x=15;6.8-6.8+3.2x=14.8-6.8,(176)xX20%=15.2,

xX20%-20%=15.2^20%),

x=763.2x=8(177)30x-30=180,30x-30+30=180+30,

30x=210,

30x+30=210+30,

x=7;(178)id13(179)1-x=工：'x=10I■^x-75%=3,2-tx-75%X75%=3X75%2x=218(180)34x-/14=2.413.4+17x=27,13.4+17x-13.4=27-13.4,17x=13.6,17x+17=13.6+17,

x=0.8;(184)9.6+3x=3.24X5,9.6+3x-9.6=16.2-9.6,3x=6.6,3x与=6.6+3,x=2.2(185)2x+5=5x-7,2x+5-2x=5x-7-2x,3x—7=5,3x-7+7=5+7,3x=12,3x与=12+3,

x=4;(186)3(x—2)=2-5(x—2),3x-6=12-5x,3x-6+5x=12-5x+5x,8x-6=12,8x-6+6=12+6,

8x=18,

8x+8=18+8,x=2.25;(181)x=4x-6=2.4,4x=2.4+6,x=8.4X,x=2.1.4.5,2Tx：4=4.5X-(187)4x-3(20-x)+4=0,

7x-56=0,

7x-56+56=0+56,

7x=56,

7x+7=56勺，

x=8;？=2,5x=2x=,X24,x=56(y+2)-4(2y-3)=24,30—2y=24,(x—4.5)X6=12.5,6x-4.5X6=12.5,6x-27=12.5,

6x-27+27=12.5+27,

6x=39.5,6x与=39.5抬，a7x=6.27-17x=13.4,27T7x+17x=13.4+17x,30-2y+2y=24+2y,2y+24=30,2y+24-24=30-24,

2y=6,2y+2=6+2,

y=3(189)4x-5X6=12,4x-30=12,4x-30+30=12+30,4x=42,40-8x+8x=12+8x8x+12=40,

8x+12-12=40-128x=28,8x+8=28+8,x=3.5.9.6-3x=6.3,9.6-3x+3x=6.3+3x,6.3+3x=9.6,6.3+3x-6.3=9.6-6.3,3x=3.3,40-8x+8x=12+8x8x+12=40,

8x+12-12=40-128x=28,8x+8=28+8,x=3.5.9.6-3x=6.3,9.6-3x+3x=6.3+3x,6.3+3x=9.6,6.3+3x-6.3=9.6-6.3,3x=3.3,3x-3=3.3+3,

x=1.1;5(x+6)=75,5x+30=75,5x+30-30=75-30,5x=45,5x+5=45代，x=9;x+0.7+0.9X3=4,xF.7+2.7=4,xF.7+2.7-2.7=4-2.7,xF.7=1.3,xF.7X0.7=1.3X0.7,x=0.91.4xX=4244,

x=10.5;8x-3x=15.6,

5x=15.6,

5x+5=15.6芍，

x=3.12;30X(xX)=60,30X(xX)+30=60+30,x+4=2,xXX4=2X4,x=8;7.2X0.5-3x=1.2,3.6-3x=1.2,3.6-3x+3x=1.2+3x,3x+1.2=3.6,3x+1.2-1.2=3.6-1.2,3x=2.4,3x+3=2.4+3,x=0.85x-2.4X5=8,5x-12+12=8+12,5x=20,5x+5=20+5,x