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266=165-x
We move all terms to the left:
266-(165-x)=0
We add all the numbers together, and all the variables
-(-1x+165)+266=0
We get rid of parentheses
1x-165+266=0
We add all the numbers together, and all the variables
x+101=0
We move all terms containing x to the left, all other terms to the right
x=-101
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