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8(8n-7)=136
We move all terms to the left:
8(8n-7)-(136)=0
We multiply parentheses
64n-56-136=0
We add all the numbers together, and all the variables
64n-192=0
We move all terms containing n to the left, all other terms to the right
64n=192
n=192/64
n=3
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