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181=113-x
We move all terms to the left:
181-(113-x)=0
We add all the numbers together, and all the variables
-(-1x+113)+181=0
We get rid of parentheses
1x-113+181=0
We add all the numbers together, and all the variables
x+68=0
We move all terms containing x to the left, all other terms to the right
x=-68
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