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-40x=12x+8
We move all terms to the left:
-40x-(12x+8)=0
We get rid of parentheses
-40x-12x-8=0
We add all the numbers together, and all the variables
-52x-8=0
We move all terms containing x to the left, all other terms to the right
-52x=8
x=8/-52
x=-2/13
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