7b-13=9b-33

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Solution for 7b-13=9b-33 equation: 



7b-13=9b-33

We move all terms to the left:

7b-13-(9b-33)=0

We get rid of parentheses

7b-9b+33-13=0

We add all the numbers together, and all the variables

-2b+20=0

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

-2b=-20

b=-20/-2

b=+10

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