X=3n+7

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Solution for X=3n+7 equation: 



X=3X+7

We move all terms to the left:

X-(3X+7)=0

We get rid of parentheses

X-3X-7=0

We add all the numbers together, and all the variables

-2X-7=0

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

-2X=7

X=7/-2

X=-3+1/2

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