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

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



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

We move all terms to the left:

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

We get rid of parentheses

-a-7a-2-15-3=0

We add all the numbers together, and all the variables

-8a-20=0

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

-8a=20

a=20/-8

a=-2+1/2

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