-15=b-18

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Solution for -15=b-18 equation: 



-15=b-18

We move all terms to the left:

-15-(b-18)=0

We get rid of parentheses

-b+18-15=0

We add all the numbers together, and all the variables

-1b+3=0

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

-b=-3

b=-3/-1

b=+3

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