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-42=-x/8
We move all terms to the left:
-42-(-x/8)=0
We get rid of parentheses
x/8-42=0
We multiply all the terms by the denominator
x-42*8=0
We add all the numbers together, and all the variables
x-336=0
We move all terms containing x to the left, all other terms to the right
x=336
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