4(3r-2)-9=91

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Solution for 4(3r-2)-9=91 equation:


Simplifying
4(3r + -2) + -9 = 91

Reorder the terms:
4(-2 + 3r) + -9 = 91
(-2 * 4 + 3r * 4) + -9 = 91
(-8 + 12r) + -9 = 91

Reorder the terms:
-8 + -9 + 12r = 91

Combine like terms: -8 + -9 = -17
-17 + 12r = 91

Solving
-17 + 12r = 91

Solving for variable 'r'.

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

Add '17' to each side of the equation.
-17 + 17 + 12r = 91 + 17

Combine like terms: -17 + 17 = 0
0 + 12r = 91 + 17
12r = 91 + 17

Combine like terms: 91 + 17 = 108
12r = 108

Divide each side by '12'.
r = 9

Simplifying
r = 9

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