X-13;x=7

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Solution for X-13;x=7 equation: 



X-13X=7

We move all terms to the left:

X-13X-(7)=0

We add all the numbers together, and all the variables

-12X-7=0

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

-12X=7

X=7/-12

X=-7/12

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