12+3r=3(3r-6)

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Solution for 12+3r=3(3r-6) equation:


Simplifying
12 + 3r = 3(3r + -6)

Reorder the terms:
12 + 3r = 3(-6 + 3r)
12 + 3r = (-6 * 3 + 3r * 3)
12 + 3r = (-18 + 9r)

Solving
12 + 3r = -18 + 9r

Solving for variable 'r'.

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

Add '-9r' to each side of the equation.
12 + 3r + -9r = -18 + 9r + -9r

Combine like terms: 3r + -9r = -6r
12 + -6r = -18 + 9r + -9r

Combine like terms: 9r + -9r = 0
12 + -6r = -18 + 0
12 + -6r = -18

Add '-12' to each side of the equation.
12 + -12 + -6r = -18 + -12

Combine like terms: 12 + -12 = 0
0 + -6r = -18 + -12
-6r = -18 + -12

Combine like terms: -18 + -12 = -30
-6r = -30

Divide each side by '-6'.
r = 5

Simplifying
r = 5

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