-18-(-6r)-3r=0

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Solution for -18-(-6r)-3r=0 equation: 



-18-(-6r)-3r=0

We add all the numbers together, and all the variables

-3r-(-6r)-18=0

We get rid of parentheses

-3r+6r-18=0

We add all the numbers together, and all the variables

3r-18=0

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

3r=18

r=18/3

r=6

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