3r+12=84

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Solution for 3r+12=84 equation: 


Simplifying
3r + 12 = 84

Reorder the terms:
12 + 3r = 84

Solving
12 + 3r = 84

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 + 3r = 84 + -12

Combine like terms: 12 + -12 = 0
0 + 3r = 84 + -12
3r = 84 + -12

Combine like terms: 84 + -12 = 72
3r = 72

Divide each side by '3'.
r = 24

Simplifying
r = 24

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