3r+18=12

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Solution for 3r+18=12 equation: 


Simplifying
3r + 18 = 12

Reorder the terms:
18 + 3r = 12

Solving
18 + 3r = 12

Solving for variable 'r'.

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

Add '-18' to each side of the equation.
18 + -18 + 3r = 12 + -18

Combine like terms: 18 + -18 = 0
0 + 3r = 12 + -18
3r = 12 + -18

Combine like terms: 12 + -18 = -6
3r = -6

Divide each side by '3'.
r = -2

Simplifying
r = -2

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