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81=64+8x
We move all terms to the left:
81-(64+8x)=0
We add all the numbers together, and all the variables
-(8x+64)+81=0
We get rid of parentheses
-8x-64+81=0
We add all the numbers together, and all the variables
-8x+17=0
We move all terms containing x to the left, all other terms to the right
-8x=-17
x=-17/-8
x=2+1/8
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