-5(-3b-21)=30(6b-2)

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Solution for -5(-3b-21)=30(6b-2) equation: 



-5(-3b-21)=30(6b-2)

We move all terms to the left:

-5(-3b-21)-(30(6b-2))=0

We multiply parentheses

15b-(30(6b-2))+105=0



We calculate terms in parentheses: -(30(6b-2)), so:

30(6b-2)

We multiply parentheses

180b-60

Back to the equation:

-(180b-60)



We get rid of parentheses

15b-180b+60+105=0

We add all the numbers together, and all the variables

-165b+165=0

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

-165b=-165

b=-165/-165

b=1

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