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