18=3(r+12)

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Solution for 18=3(r+12) equation:


Simplifying
18 = 3(r + 12)

Reorder the terms:
18 = 3(12 + r)
18 = (12 * 3 + r * 3)
18 = (36 + 3r)

Solving
18 = 36 + 3r

Solving for variable 'r'.

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

Add '-3r' to each side of the equation.
18 + -3r = 36 + 3r + -3r

Combine like terms: 3r + -3r = 0
18 + -3r = 36 + 0
18 + -3r = 36

Add '-18' to each side of the equation.
18 + -18 + -3r = 36 + -18

Combine like terms: 18 + -18 = 0
0 + -3r = 36 + -18
-3r = 36 + -18

Combine like terms: 36 + -18 = 18
-3r = 18

Divide each side by '-3'.
r = -6

Simplifying
r = -6

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