X+20+x+120-3x=180

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Solution for X+20+x+120-3x=180 equation: 



X+20+X+120-3X=180

We move all terms to the left:

X+20+X+120-3X-(180)=0

We add all the numbers together, and all the variables

-1X-40=0

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

-X=40

X=40/-1

X=-40

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