-9r-10r+13r=-18

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Solution for -9r-10r+13r=-18 equation: 



-9r-10r+13r=-18

We move all terms to the left:

-9r-10r+13r-(-18)=0

We add all the numbers together, and all the variables

-6r+18=0

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

-6r=-18

r=-18/-6

r=+3

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