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218=3-x
We move all terms to the left:
218-(3-x)=0
We add all the numbers together, and all the variables
-(-1x+3)+218=0
We get rid of parentheses
1x-3+218=0
We add all the numbers together, and all the variables
x+215=0
We move all terms containing x to the left, all other terms to the right
x=-215
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