-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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