6a+15=-2a-9

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



6a+15=-2a-9

We move all terms to the left:

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

We get rid of parentheses

6a+2a+9+15=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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