-3(r-3)=12

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


Simplifying
-3(r + -3) = 12

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

Solving
9 + -3r = 12

Solving for variable 'r'.

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

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

Combine like terms: 9 + -9 = 0
0 + -3r = 12 + -9
-3r = 12 + -9

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

Divide each side by '-3'.
r = -1

Simplifying
r = -1

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