90=-3-3(7b-3)

Solution for 90=-3-3(7b-3) equation:

90=-3-3(7b-3)

We move all terms to the left:

90-(-3-3(7b-3))=0


We calculate terms in parentheses: -(-3-3(7b-3)), so:

-3-3(7b-3)

determiningTheFunctionDomain
-3(7b-3)-3

We multiply parentheses

-21b+9-3

We add all the numbers together, and all the variables

-21b+6

Back to the equation:

-(-21b+6)


We get rid of parentheses

21b-6+90=0

We add all the numbers together, and all the variables

21b+84=0

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

21b=-84

b=-84/21

b=-4