2-a-9=6a+15

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Solution for 2-a-9=6a+15 equation: 



2-a-9=6a+15

We move all terms to the left:

2-a-9-(6a+15)=0

We add all the numbers together, and all the variables

-1a-(6a+15)-7=0

We get rid of parentheses

-1a-6a-15-7=0

We add all the numbers together, and all the variables

-7a-22=0

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

-7a=22

a=22/-7

a=-3+1/7

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