-2r-5r=-15-4r

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Solution for -2r-5r=-15-4r equation: 



-2r-5r=-15-4r

We move all terms to the left:

-2r-5r-(-15-4r)=0

We add all the numbers together, and all the variables

-2r-5r-(-4r-15)=0

We add all the numbers together, and all the variables

-7r-(-4r-15)=0

We get rid of parentheses

-7r+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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