-2a-9=-3a+9a+15

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Solution for -2a-9=-3a+9a+15 equation: 



-2a-9=-3a+9a+15

We move all terms to the left:

-2a-9-(-3a+9a+15)=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

-2a-6a-15-9=0

We add all the numbers together, and all the variables

-8a-24=0

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

-8a=24

a=24/-8

a=-3

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