3r-12r=18

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Solution for 3r-12r=18 equation: 


Simplifying
3r + -12r = 18

Combine like terms: 3r + -12r = -9r
-9r = 18

Solving
-9r = 18

Solving for variable 'r'.

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

Divide each side by '-9'.
r = -2

Simplifying
r = -2

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