15-12r=9

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Solution for 15-12r=9 equation: 


Simplifying
15 + -12r = 9

Solving
15 + -12r = 9

Solving for variable 'r'.

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

Add '-15' to each side of the equation.
15 + -15 + -12r = 9 + -15

Combine like terms: 15 + -15 = 0
0 + -12r = 9 + -15
-12r = 9 + -15

Combine like terms: 9 + -15 = -6
-12r = -6

Divide each side by '-12'.
r = 0.5

Simplifying
r = 0.5

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