-5a-8=7

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Solution for -5a-8=7 equation: 



-5a-8=7

We move all terms to the left:

-5a-8-(7)=0

We add all the numbers together, and all the variables

-5a-15=0

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

-5a=15

a=15/-5

a=-3

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