-19=3r+2

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Solution for -19=3r+2 equation: 



-19=3r+2

We move all terms to the left:

-19-(3r+2)=0

We get rid of parentheses

-3r-2-19=0

We add all the numbers together, and all the variables

-3r-21=0

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

-3r=21

r=21/-3

r=-7

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