X+80=2x-20+x+20

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Solution for X+80=2x-20+x+20 equation: 



X+80=2X-20+X+20

We move all terms to the left:

X+80-(2X-20+X+20)=0

We add all the numbers together, and all the variables

X-(+3X)+80=0

We get rid of parentheses

X-3X+80=0

We add all the numbers together, and all the variables

-2X+80=0

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

-2X=-80

X=-80/-2

X=+40

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