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0.5x=0.4-x
We move all terms to the left:
0.5x-(0.4-x)=0
We add all the numbers together, and all the variables
0.5x-(-1x+0.4)=0
We get rid of parentheses
0.5x+1x-0.4=0
We add all the numbers together, and all the variables
1.5x-0.4=0
We move all terms containing x to the left, all other terms to the right
1.5x=0.4
x=0.4/1.5
x=0.4/1.5
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