7+a=8a-(-9)

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Solution for 7+a=8a-(-9) equation: 



7+a=8a-(-9)

We move all terms to the left:

7+a-(8a-(-9))=0



We calculate terms in parentheses: -(8a-(-9)), so:

8a-(-9)

We add all the numbers together, and all the variables

8a+9

Back to the equation:

-(8a+9)



We get rid of parentheses

a-8a-9+7=0

We add all the numbers together, and all the variables

-7a-2=0

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

-7a=2

a=2/-7

a=-2/7

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