-21-9b=8(2b-7)

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Solution for -21-9b=8(2b-7) equation: 



-21-9b=8(2b-7)

We move all terms to the left:

-21-9b-(8(2b-7))=0



We calculate terms in parentheses: -(8(2b-7)), so:

8(2b-7)

We multiply parentheses

16b-56

Back to the equation:

-(16b-56)



We get rid of parentheses

-9b-16b+56-21=0

We add all the numbers together, and all the variables

-25b+35=0

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

-25b=-35

b=-35/-25

b=1+2/5

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