15=2x+7x

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Solution for 15=2x+7x equation: 



15=2x+7x

We move all terms to the left:

15-(2x+7x)=0

We add all the numbers together, and all the variables

-(+9x)+15=0

We get rid of parentheses

-9x+15=0

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

-9x=-15

x=-15/-9

x=1+2/3

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