(1) 0.2X+0.2*4.8=11.2(2) X/0.5-2.25=0.75(3)5*(X+2)-78=2

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(1) 0.2X+0.2*4.8=11.2(2) X/0.5-2.25=0.75(3)5*(X+2)-78=2
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(1) 0.2X+0.2*4.8=11.2(2) X/0.5-2.25=0.75(3)5*(X+2)-78=2
(1) 0.2X+0.2*4.8=11.2
(2) X/0.5-2.25=0.75
(3)5*(X+2)-78=2

(1) 0.2X+0.2*4.8=11.2(2) X/0.5-2.25=0.75(3)5*(X+2)-78=2
(1)等式两边扩大相同倍数100倍即:20X+96=1120 那么20X=1120-96 得X=51.2
(2)首先简化一下X/0.5就是2X 那么2X=0.75+2.25 得X=3/2
(3)首先分解括号即:5X+10=2+78 继续分解5X=2+78+10 得X=18
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0.2X+0.96=11.2
0.2X=10.24
X=51.2
X/0.5=3
X=6
5*(X+2)=80
X+2=16
X=14

1.0.2X+9.6=11.2
0.2X =11.2-9.6
0.2X =1.6
0.2 =8

（1）0.2X+0.2*4.8=11.2
0.2X+0.96=11.2
0.2X=10.24

X=51.2
(2) X/0.5-2.25=0.75
X/0.5=3

X=6
(3) 5*(X+2)-78=2
5*(X+2)=80

X+2=16
X=14

1) 0.2X+0.2*4.8=11.2
(2) X/0.5-2.25=0.75
(3)5*(X+2)-78=2

0.2X+0.2*4.8=1

(x-1)+(x+2)+0.2x+2x=46 X+1/0.2-2X=0.1x+0.2/0.03: 化简(2x-5)(3x+2)-6(x+1)(x-2),其中x=0.2 x-2/0.2-x+1/0.5=3 x=? 0.2x-6=1.6x+1 x=? (x+1)/0.3-2x=(0.1x+0.2)/0.05 x-2/0.2-x+1/0.5=3求x (1+0.2)X=(X-64)/0. （X-1)/0.2 -X/0.8 =10 0.2/x-0.5/x=1 解方程x-0.2x-27-(x-0.2x-27)*0.1=x/2+10.8x-27-0.08x+2.7=x/2+1对吗 x+3/20x=46 ,x-1/5x=40 ,x-1/2x=3/4 ,x-0.2x=18解方程 求1/2x^2-1/4x+0.2x^3+0.25x-0.5x^2-1/5x^3+0.5x-1 其中x=12/13 求1/2x^2-1/4x+0.2x^3+0.25x-0.5x^2-1/5x^3+0.5x-1 其中x=12/13 21分之10x÷3分之2=7分之3x-3分之1x-2分之1x=190x-53x=7408.5x-6.9x=43.3x-200=0.2x+1101.02+0.4x+2.6x=3.428.9x-67=4.5x+656x-58=3x+1410x-20=5x+806x+5=10x-3420-1.4x=9.8x-288.2x+5.4x=272 x-30-0.2x=0.5x x-0.2x=80 求x (X-8)/X=0.2(X-8)/X=0.2