3(4+5r)=-108

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Solution for 3(4+5r)=-108 equation: 


Simplifying
3(4 + 5r) = -108
(4 * 3 + 5r * 3) = -108
(12 + 15r) = -108

Solving
12 + 15r = -108

Solving for variable 'r'.

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

Add '-12' to each side of the equation.
12 + -12 + 15r = -108 + -12

Combine like terms: 12 + -12 = 0
0 + 15r = -108 + -12
15r = -108 + -12

Combine like terms: -108 + -12 = -120
15r = -120

Divide each side by '15'.
r = -8

Simplifying
r = -8

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