7a+15=-3-2a

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Solution for 7a+15=-3-2a equation: 



7a+15=-3-2a

We move all terms to the left:

7a+15-(-3-2a)=0

We add all the numbers together, and all the variables

7a-(-2a-3)+15=0

We get rid of parentheses

7a+2a+3+15=0

We add all the numbers together, and all the variables

9a+18=0

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

9a=-18

a=-18/9

a=-2

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