15=2x+x-6

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Solution for 15=2x+x-6 equation: 



15=2x+x-6

We move all terms to the left:

15-(2x+x-6)=0

We add all the numbers together, and all the variables

-(3x-6)+15=0

We get rid of parentheses

-3x+6+15=0

We add all the numbers together, and all the variables

-3x+21=0

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

-3x=-21

x=-21/-3

x=+7

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