-3(12+r)=-72

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Solution for -3(12+r)=-72 equation: 


Simplifying
-3(12 + r) = -72
(12 * -3 + r * -3) = -72
(-36 + -3r) = -72

Solving
-36 + -3r = -72

Solving for variable 'r'.

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

Add '36' to each side of the equation.
-36 + 36 + -3r = -72 + 36

Combine like terms: -36 + 36 = 0
0 + -3r = -72 + 36
-3r = -72 + 36

Combine like terms: -72 + 36 = -36
-3r = -36

Divide each side by '-3'.
r = 12

Simplifying
r = 12

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