r+216=-4r-9

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Solution for r+216=-4r-9 equation: 



r+216=-4r-9

We move all terms to the left:

r+216-(-4r-9)=0

We get rid of parentheses

r+4r+9+216=0

We add all the numbers together, and all the variables

5r+225=0

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

5r=-225

r=-225/5

r=-45

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