90=9(b+4)

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Solution for 90=9(b+4) equation: 



90=9(b+4)

We move all terms to the left:

90-(9(b+4))=0



We calculate terms in parentheses: -(9(b+4)), so:

9(b+4)

We multiply parentheses

9b+36

Back to the equation:

-(9b+36)



We get rid of parentheses

-9b-36+90=0

We add all the numbers together, and all the variables

-9b+54=0

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

-9b=-54

b=-54/-9

b=+6

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