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8(z-87)=87
We move all terms to the left:
8(z-87)-(87)=0
We multiply parentheses
8z-696-87=0
We add all the numbers together, and all the variables
8z-783=0
We move all terms containing z to the left, all other terms to the right
8z=783
z=783/8
z=97+7/8
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