(9-r)3-12r=33

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Solution for (9-r)3-12r=33 equation:


Simplifying
(9 + -1r) * 3 + -12r = 33

Reorder the terms for easier multiplication:
3(9 + -1r) + -12r = 33
(9 * 3 + -1r * 3) + -12r = 33
(27 + -3r) + -12r = 33

Combine like terms: -3r + -12r = -15r
27 + -15r = 33

Solving
27 + -15r = 33

Solving for variable 'r'.

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

Add '-27' to each side of the equation.
27 + -27 + -15r = 33 + -27

Combine like terms: 27 + -27 = 0
0 + -15r = 33 + -27
-15r = 33 + -27

Combine like terms: 33 + -27 = 6
-15r = 6

Divide each side by '-15'.
r = -0.4

Simplifying
r = -0.4

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