7a-1=-8

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Solution for 7a-1=-8 equation: 



7a-1=-8

We move all terms to the left:

7a-1-(-8)=0

We add all the numbers together, and all the variables

7a+7=0

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

7a=-7

a=-7/7

a=-1

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