-3(r+1)=-12

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Solution for -3(r+1)=-12 equation: 


Simplifying
-3(r + 1) = -12

Reorder the terms:
-3(1 + r) = -12
(1 * -3 + r * -3) = -12
(-3 + -3r) = -12

Solving
-3 + -3r = -12

Solving for variable 'r'.

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

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

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

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

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

Simplifying
r = 3

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