-4r+12=-72

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Solution for -4r+12=-72 equation: 


Simplifying
-4r + 12 = -72

Reorder the terms:
12 + -4r = -72

Solving
12 + -4r = -72

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 + -4r = -72 + -12

Combine like terms: 12 + -12 = 0
0 + -4r = -72 + -12
-4r = -72 + -12

Combine like terms: -72 + -12 = -84
-4r = -84

Divide each side by '-4'.
r = 21

Simplifying
r = 21

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