3b-9=4b+4

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Solution for 3b-9=4b+4 equation: 



3b-9=4b+4

We move all terms to the left:

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

We get rid of parentheses

3b-4b-4-9=0

We add all the numbers together, and all the variables

-1b-13=0

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

-b=13

b=13/-1

b=-13

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