r+2r=-9

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Solution for r+2r=-9 equation: 


Simplifying
r + 2r = -9

Combine like terms: r + 2r = 3r
3r = -9

Solving
3r = -9

Solving for variable 'r'.

Move all terms containing r to the left, all other terms to the right.

Divide each side by '3'.
r = -3

Simplifying
r = -3

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