15+3=-4b

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Solution for 15+3=-4b equation: 



15+3=-4b

We move all terms to the left:

15+3-(-4b)=0

We add all the numbers together, and all the variables

-(-4b)+18=0

We get rid of parentheses

4b+18=0

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

4b=-18

b=-18/4

b=-4+1/2

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