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0.4=x+0.2-0.2x
We move all terms to the left:
0.4-(x+0.2-0.2x)=0
We add all the numbers together, and all the variables
-(0.8x+0.2)+0.4=0
We get rid of parentheses
-0.8x-0.2+0.4=0
We add all the numbers together, and all the variables
-0.8x+0.2=0
We move all terms containing x to the left, all other terms to the right
-0.8x=-0.2
x=-0.2/-0.8
x=0.2/0.8
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