4b=3(3b-15)

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Solution for 4b=3(3b-15) equation: 



4b=3(3b-15)

We move all terms to the left:

4b-(3(3b-15))=0



We calculate terms in parentheses: -(3(3b-15)), so:

3(3b-15)

We multiply parentheses

9b-45

Back to the equation:

-(9b-45)



We get rid of parentheses

4b-9b+45=0

We add all the numbers together, and all the variables

-5b+45=0

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

-5b=-45

b=-45/-5

b=+9

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