2(3r-9)=12

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Solution for 2(3r-9)=12 equation: 


Simplifying
2(3r + -9) = 12

Reorder the terms:
2(-9 + 3r) = 12
(-9 * 2 + 3r * 2) = 12
(-18 + 6r) = 12

Solving
-18 + 6r = 12

Solving for variable 'r'.

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

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

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

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

Divide each side by '6'.
r = 5

Simplifying
r = 5

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