-18=r-3-6r

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Solution for -18=r-3-6r equation: 



-18=r-3-6r

We move all terms to the left:

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

We add all the numbers together, and all the variables

-(-5r-3)-18=0

We get rid of parentheses

5r+3-18=0

We add all the numbers together, and all the variables

5r-15=0

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

5r=15

r=15/5

r=3

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