0.01分之0.2(0.2 -x)+1.2x=0.12+20x

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0.01分之0.2(0.2-x)+1.2x=0.12+20x0.01分之0.2(0.2-x)+1.2x=0.12+20x0.01分之0.2(0.2-x)+1.2x=0.12+20x0.01分之0.2(

0.01分之0.2(0.2 -x)+1.2x=0.12+20x
0.01分之0.2(0.2 -x)+1.2x=0.12+20x

0.01分之0.2(0.2 -x)+1.2x=0.12+20x
0.01分之0.2(0.2 -x)+1.2x=0.12+20x
20(0.2 -x)+1.2x=0.12+20x
4-20X+1.2X=0.12+20X
38.8X=3.88
X=0.1