7-x+8=57

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Solution for 7-x+8=57 equation: 



7-x+8=57

We move all terms to the left:

7-x+8-(57)=0

We add all the numbers together, and all the variables

-1x-42=0

We move all terms containing x to the left, all other terms to the right

-x=42

x=42/-1

x=-42

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