90=-6-3(8-5b)

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Solution for 90=-6-3(8-5b) equation: 



90=-6-3(8-5b)

We move all terms to the left:

90-(-6-3(8-5b))=0

We add all the numbers together, and all the variables

-(-6-3(-5b+8))+90=0



We calculate terms in parentheses: -(-6-3(-5b+8)), so:

-6-3(-5b+8)

determiningTheFunctionDomain
-3(-5b+8)-6

We multiply parentheses

15b-24-6

We add all the numbers together, and all the variables

15b-30

Back to the equation:

-(15b-30)



We get rid of parentheses

-15b+30+90=0

We add all the numbers together, and all the variables

-15b+120=0

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

-15b=-120

b=-120/-15

b=+8

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