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7(x-7)=15
We move all terms to the left:
7(x-7)-(15)=0
We multiply parentheses
7x-49-15=0
We add all the numbers together, and all the variables
7x-64=0
We move all terms containing x to the left, all other terms to the right
7x=64
x=64/7
x=9+1/7
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