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(2b+19)/5(-9)=3b

We move all terms to the left:

(2b+19)/5(-9)-(3b)=0

We add all the numbers together, and all the variables

-3b+(2b+19)/5(-9)=0

We multiply all the terms by the denominator

-3b*5(-9)+(2b+19)=0

Wy multiply elements

-15b^2(-+(2b+19)=0

We use the square of the difference formula

-15b^2(-(2b+19)=0

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