7b-9=4(b-3)

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Solution for 7b-9=4(b-3) equation: 



7b-9=4(b-3)

We move all terms to the left:

7b-9-(4(b-3))=0



We calculate terms in parentheses: -(4(b-3)), so:

4(b-3)

We multiply parentheses

4b-12

Back to the equation:

-(4b-12)



We get rid of parentheses

7b-4b+12-9=0

We add all the numbers together, and all the variables

3b+3=0

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

3b=-3

b=-3/3

b=-1

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