6-9r=-129

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Solution for 6-9r=-129 equation: 


Simplifying
6 + -9r = -129

Solving
6 + -9r = -129

Solving for variable 'r'.

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

Add '-6' to each side of the equation.
6 + -6 + -9r = -129 + -6

Combine like terms: 6 + -6 = 0
0 + -9r = -129 + -6
-9r = -129 + -6

Combine like terms: -129 + -6 = -135
-9r = -135

Divide each side by '-9'.
r = 15

Simplifying
r = 15

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