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351.56=220+0.52x
We move all terms to the left:
351.56-(220+0.52x)=0
We add all the numbers together, and all the variables
-(0.52x+220)+351.56=0
We get rid of parentheses
-0.52x-220+351.56=0
We add all the numbers together, and all the variables
-0.52x+131.56=0
We move all terms containing x to the left, all other terms to the right
-0.52x=-131.56
x=-131.56/-0.52
x=+253
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