90-15=15(b+2)-2b-9

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Solution for 90-15=15(b+2)-2b-9 equation: 



90-15=15(b+2)-2b-9

We move all terms to the left:

90-15-(15(b+2)-2b-9)=0

We add all the numbers together, and all the variables

-(15(b+2)-2b-9)+75=0



We calculate terms in parentheses: -(15(b+2)-2b-9), so:

15(b+2)-2b-9

We add all the numbers together, and all the variables

-2b+15(b+2)-9

We multiply parentheses

-2b+15b+30-9

We add all the numbers together, and all the variables

13b+21

Back to the equation:

-(13b+21)



We get rid of parentheses

-13b-21+75=0

We add all the numbers together, and all the variables

-13b+54=0

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

-13b=-54

b=-54/-13

b=4+2/13

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