18=-6r-7r

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Solution for 18=-6r-7r equation: 



18=-6r-7r

We move all terms to the left:

18-(-6r-7r)=0

We add all the numbers together, and all the variables

-(-13r)+18=0

We get rid of parentheses

13r+18=0

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

13r=-18

r=-18/13

r=-1+5/13

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