-7-7a=2(1+a)

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Solution for -7-7a=2(1+a) equation: 



-7-7a=2(1+a)

We move all terms to the left:

-7-7a-(2(1+a))=0

We add all the numbers together, and all the variables

-7a-(2(a+1))-7=0



We calculate terms in parentheses: -(2(a+1)), so:

2(a+1)

We multiply parentheses

2a+2

Back to the equation:

-(2a+2)



We get rid of parentheses

-7a-2a-2-7=0

We add all the numbers together, and all the variables

-9a-9=0

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

-9a=9

a=9/-9

a=-1

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