120=-x+220

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Solution for 120=-x+220 equation: 



120=-x+220

We move all terms to the left:

120-(-x+220)=0

We add all the numbers together, and all the variables

-(-1x+220)+120=0

We get rid of parentheses

1x-220+120=0

We add all the numbers together, and all the variables

x-100=0

We move all terms containing x to the left, all other terms to the right

x=100

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