X+20=3x-20

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Solution for X+20=3x-20 equation: 



X+20=3X-20

We move all terms to the left:

X+20-(3X-20)=0

We get rid of parentheses

X-3X+20+20=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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