-9(-8+r)=-99

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Solution for -9(-8+r)=-99 equation: 


Simplifying
-9(-8 + r) = -99
(-8 * -9 + r * -9) = -99
(72 + -9r) = -99

Solving
72 + -9r = -99

Solving for variable 'r'.

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

Add '-72' to each side of the equation.
72 + -72 + -9r = -99 + -72

Combine like terms: 72 + -72 = 0
0 + -9r = -99 + -72
-9r = -99 + -72

Combine like terms: -99 + -72 = -171
-9r = -171

Divide each side by '-9'.
r = 19

Simplifying
r = 19

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