1+a-8a=-20

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Solution for 1+a-8a=-20 equation: 



1+a-8a=-20

We move all terms to the left:

1+a-8a-(-20)=0

We add all the numbers together, and all the variables

-7a+21=0

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

-7a=-21

a=-21/-7

a=+3

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