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x/8-31=-40
We move all terms to the left:
x/8-31-(-40)=0
We add all the numbers together, and all the variables
x/8+9=0
We multiply all the terms by the denominator
x+9*8=0
We add all the numbers together, and all the variables
x+72=0
We move all terms containing x to the left, all other terms to the right
x=-72
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