-8a-7a=15

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Solution for -8a-7a=15 equation: 



-8a-7a=15

We move all terms to the left:

-8a-7a-(15)=0

We add all the numbers together, and all the variables

-15a-15=0

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

-15a=15

a=15/-15

a=-1

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