15+3b=45

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Solution for 15+3b=45 equation: 



15+3b=45

We move all terms to the left:

15+3b-(45)=0

We add all the numbers together, and all the variables

3b-30=0

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

3b=30

b=30/3

b=10

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