X-3x=72

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Solution for X-3x=72 equation: 



X-3X=72

We move all terms to the left:

X-3X-(72)=0

We add all the numbers together, and all the variables

-2X-72=0

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

-2X=72

X=72/-2

X=-36

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