-3r-6r=9

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Solution for -3r-6r=9 equation: 


Simplifying
-3r + -6r = 9

Combine like terms: -3r + -6r = -9r
-9r = 9

Solving
-9r = 9

Solving for variable 'r'.

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

Divide each side by '-9'.
r = -1

Simplifying
r = -1

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