a-6-2a=15+6a

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



a-6-2a=15+6a

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We add all the numbers together, and all the variables

-1a-(6a+15)-6=0

We get rid of parentheses

-1a-6a-15-6=0

We add all the numbers together, and all the variables

-7a-21=0

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

-7a=21

a=21/-7

a=-3

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