5(12-r)=-15

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Solution for 5(12-r)=-15 equation: 


Simplifying
5(12 + -1r) = -15
(12 * 5 + -1r * 5) = -15
(60 + -5r) = -15

Solving
60 + -5r = -15

Solving for variable 'r'.

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

Add '-60' to each side of the equation.
60 + -60 + -5r = -15 + -60

Combine like terms: 60 + -60 = 0
0 + -5r = -15 + -60
-5r = -15 + -60

Combine like terms: -15 + -60 = -75
-5r = -75

Divide each side by '-5'.
r = 15

Simplifying
r = 15

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