3r-3=12

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Solution for 3r-3=12 equation: 


Simplifying
3r + -3 = 12

Reorder the terms:
-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 = 15
3r = 15

Divide each side by '3'.
r = 5

Simplifying
r = 5

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