X+80=3x+40

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Solution for X+80=3x+40 equation: 



X+80=3X+40

We move all terms to the left:

X+80-(3X+40)=0

We get rid of parentheses

X-3X-40+80=0

We add all the numbers together, and all the variables

-2X+40=0

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

-2X=-40

X=-40/-2

X=+20

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