X-2x=120

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Solution for X-2x=120 equation: 



X-2X=120

We move all terms to the left:

X-2X-(120)=0

We add all the numbers together, and all the variables

-1X-120=0

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

-X=120

X=120/-1

X=-120

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