r+7=-7r-9

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Solution for r+7=-7r-9 equation: 



r+7=-7r-9

We move all terms to the left:

r+7-(-7r-9)=0

We get rid of parentheses

r+7r+9+7=0

We add all the numbers together, and all the variables

8r+16=0

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

8r=-16

r=-16/8

r=-2

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