-15-r=2r-6r

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Solution for -15-r=2r-6r equation: 



-15-r=2r-6r

We move all terms to the left:

-15-r-(2r-6r)=0

We add all the numbers together, and all the variables

-r-(-4r)-15=0

We add all the numbers together, and all the variables

-1r-(-4r)-15=0

We get rid of parentheses

-1r+4r-15=0

We add all the numbers together, and all the variables

3r-15=0

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

3r=15

r=15/3

r=5

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