-6a+15=57

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Solution for -6a+15=57 equation: 



-6a+15=57

We move all terms to the left:

-6a+15-(57)=0

We add all the numbers together, and all the variables

-6a-42=0

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

-6a=42

a=42/-6

a=-7

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