-2(r+3)+5r=15

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Solution for -2(r+3)+5r=15 equation: 



-2(r+3)+5r=15

We move all terms to the left:

-2(r+3)+5r-(15)=0

We add all the numbers together, and all the variables

5r-2(r+3)-15=0

We multiply parentheses

5r-2r-6-15=0

We add all the numbers together, and all the variables

3r-21=0

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

3r=21

r=21/3

r=7

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