8a+7=-1

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Solution for 8a+7=-1 equation: 



8a+7=-1

We move all terms to the left:

8a+7-(-1)=0

We add all the numbers together, and all the variables

8a+8=0

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

8a=-8

a=-8/8

a=-1

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