r+15=4r-6r

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Solution for r+15=4r-6r equation: 



r+15=4r-6r

We move all terms to the left:

r+15-(4r-6r)=0

We add all the numbers together, and all the variables

r-(-2r)+15=0

We get rid of parentheses

r+2r+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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