-15b=20-19b

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Solution for -15b=20-19b equation: 



-15b=20-19b

We move all terms to the left:

-15b-(20-19b)=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

-15b+19b-20=0

We add all the numbers together, and all the variables

4b-20=0

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

4b=20

b=20/4

b=5

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