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252=-x+77
We move all terms to the left:
252-(-x+77)=0
We add all the numbers together, and all the variables
-(-1x+77)+252=0
We get rid of parentheses
1x-77+252=0
We add all the numbers together, and all the variables
x+175=0
We move all terms containing x to the left, all other terms to the right
x=-175
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