x-7=15;x=8

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Solution for x-7=15;x=8 equation: 



x-7=15x=8

We move all terms to the left:

x-7-(15x)=0

We add all the numbers together, and all the variables

-14x-7=0

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

-14x=7

x=7/-14

x=-1/2

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