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-57=7x-1
We move all terms to the left:
-57-(7x-1)=0
We get rid of parentheses
-7x+1-57=0
We add all the numbers together, and all the variables
-7x-56=0
We move all terms containing x to the left, all other terms to the right
-7x=56
x=56/-7
x=-8
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