2r+8r+15=r-3

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Solution for 2r+8r+15=r-3 equation: 



2r+8r+15=r-3

We move all terms to the left:

2r+8r+15-(r-3)=0

We add all the numbers together, and all the variables

10r-(r-3)+15=0

We get rid of parentheses

10r-r+3+15=0

We add all the numbers together, and all the variables

9r+18=0

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

9r=-18

r=-18/9

r=-2

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