3=2b-15

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Solution for 3=2b-15 equation: 



3=2b-15

We move all terms to the left:

3-(2b-15)=0

We get rid of parentheses

-2b+15+3=0

We add all the numbers together, and all the variables

-2b+18=0

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

-2b=-18

b=-18/-2

b=+9

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