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-158+x=138+9x
We move all terms to the left:
-158+x-(138+9x)=0
We add all the numbers together, and all the variables
x-(9x+138)-158=0
We get rid of parentheses
x-9x-138-158=0
We add all the numbers together, and all the variables
-8x-296=0
We move all terms containing x to the left, all other terms to the right
-8x=296
x=296/-8
x=-37
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