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222=166-x
We move all terms to the left:
222-(166-x)=0
We add all the numbers together, and all the variables
-(-1x+166)+222=0
We get rid of parentheses
1x-166+222=0
We add all the numbers together, and all the variables
x+56=0
We move all terms containing x to the left, all other terms to the right
x=-56
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