2r+8=-7-r

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



2r+8=-7-r

We move all terms to the left:

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

We add all the numbers together, and all the variables

2r-(-1r-7)+8=0

We get rid of parentheses

2r+1r+7+8=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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