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227=85-x
We move all terms to the left:
227-(85-x)=0
We add all the numbers together, and all the variables
-(-1x+85)+227=0
We get rid of parentheses
1x-85+227=0
We add all the numbers together, and all the variables
x+142=0
We move all terms containing x to the left, all other terms to the right
x=-142
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