45=b+15

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Solution for 45=b+15 equation: 



45=b+15

We move all terms to the left:

45-(b+15)=0

We get rid of parentheses

-b-15+45=0

We add all the numbers together, and all the variables

-1b+30=0

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

-b=-30

b=-30/-1

b=+30

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