-12b-20=19+18-15b

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Solution for -12b-20=19+18-15b equation: 



-12b-20=19+18-15b

We move all terms to the left:

-12b-20-(19+18-15b)=0

We add all the numbers together, and all the variables

-12b-(-15b+37)-20=0

We get rid of parentheses

-12b+15b-37-20=0

We add all the numbers together, and all the variables

3b-57=0

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

3b=57

b=57/3

b=19

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