90=6-4(-7-7a)

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Solution for 90=6-4(-7-7a) equation: 



90=6-4(-7-7a)

We move all terms to the left:

90-(6-4(-7-7a))=0

We add all the numbers together, and all the variables

-(6-4(-7a-7))+90=0



We calculate terms in parentheses: -(6-4(-7a-7)), so:

6-4(-7a-7)

determiningTheFunctionDomain
-4(-7a-7)+6

We multiply parentheses

28a+28+6

We add all the numbers together, and all the variables

28a+34

Back to the equation:

-(28a+34)



We get rid of parentheses

-28a-34+90=0

We add all the numbers together, and all the variables

-28a+56=0

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

-28a=-56

a=-56/-28

a=+2

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