15-5b=45-20b

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Solution for 15-5b=45-20b equation: 



15-5b=45-20b

We move all terms to the left:

15-5b-(45-20b)=0

We add all the numbers together, and all the variables

-5b-(-20b+45)+15=0

We get rid of parentheses

-5b+20b-45+15=0

We add all the numbers together, and all the variables

15b-30=0

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

15b=30

b=30/15

b=2

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