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a/8+7=-1
We move all terms to the left:
a/8+7-(-1)=0
We add all the numbers together, and all the variables
a/8+8=0
We multiply all the terms by the denominator
a+8*8=0
We add all the numbers together, and all the variables
a+64=0
We move all terms containing a to the left, all other terms to the right
a=-64
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