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-x/5=57
We move all terms to the left:
-x/5-(57)=0
We multiply all the terms by the denominator
-x-57*5=0
We add all the numbers together, and all the variables
-1x-285=0
We move all terms containing x to the left, all other terms to the right
-x=285
x=285/-1
x=-285
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