-13r+19=-19-2-9r

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Solution for -13r+19=-19-2-9r equation: 



-13r+19=-19-2-9r

We move all terms to the left:

-13r+19-(-19-2-9r)=0

We add all the numbers together, and all the variables

-13r-(-9r-21)+19=0

We get rid of parentheses

-13r+9r+21+19=0

We add all the numbers together, and all the variables

-4r+40=0

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

-4r=-40

r=-40/-4

r=+10

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