-1-a=-7a+8a

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Solution for -1-a=-7a+8a equation: 



-1-a=-7a+8a

We move all terms to the left:

-1-a-(-7a+8a)=0

We add all the numbers together, and all the variables

-a-(+a)-1=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

-1a-a-1=0

We add all the numbers together, and all the variables

-2a-1=0

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

-2a=1

a=1/-2

a=-1/2

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