-28-7a=2(a+3)+8a

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Solution for -28-7a=2(a+3)+8a equation: 



-28-7a=2(a+3)+8a

We move all terms to the left:

-28-7a-(2(a+3)+8a)=0



We calculate terms in parentheses: -(2(a+3)+8a), so:

2(a+3)+8a

We add all the numbers together, and all the variables

8a+2(a+3)

We multiply parentheses

8a+2a+6

We add all the numbers together, and all the variables

10a+6

Back to the equation:

-(10a+6)



We get rid of parentheses

-7a-10a-6-28=0

We add all the numbers together, and all the variables

-17a-34=0

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

-17a=34

a=34/-17

a=-2

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