-8r-2r=-15-7r

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Solution for -8r-2r=-15-7r equation: 



-8r-2r=-15-7r

We move all terms to the left:

-8r-2r-(-15-7r)=0

We add all the numbers together, and all the variables

-8r-2r-(-7r-15)=0

We add all the numbers together, and all the variables

-10r-(-7r-15)=0

We get rid of parentheses

-10r+7r+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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