-19-20+9r=18+6r

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Solution for -19-20+9r=18+6r equation: 



-19-20+9r=18+6r

We move all terms to the left:

-19-20+9r-(18+6r)=0

We add all the numbers together, and all the variables

9r-(6r+18)-19-20=0

We add all the numbers together, and all the variables

9r-(6r+18)-39=0

We get rid of parentheses

9r-6r-18-39=0

We add all the numbers together, and all the variables

3r-57=0

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

3r=57

r=57/3

r=19

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