21+8b=-3(5b-6)

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Solution for 21+8b=-3(5b-6) equation: 



21+8b=-3(5b-6)

We move all terms to the left:

21+8b-(-3(5b-6))=0



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

-3(5b-6)

We multiply parentheses

-15b+18

Back to the equation:

-(-15b+18)



We get rid of parentheses

8b+15b-18+21=0

We add all the numbers together, and all the variables

23b+3=0

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

23b=-3

b=-3/23

b=-3/23

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