6(R-1)+3R=12

Solution for 6(R-1)+3R=12 equation:

Simplifying
6(R + -1) + 3R = 12

Reorder the terms:
6(-1 + R) + 3R = 12
(-1 * 6 + R * 6) + 3R = 12
(-6 + 6R) + 3R = 12

Combine like terms: 6R + 3R = 9R
-6 + 9R = 12

Solving
-6 + 9R = 12

Solving for variable 'R'.

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

Add '6' to each side of the equation.
-6 + 6 + 9R = 12 + 6

Combine like terms: -6 + 6 = 0
0 + 9R = 12 + 6
9R = 12 + 6

Combine like terms: 12 + 6 = 18
9R = 18

Divide each side by '9'.
R = 2

Simplifying
R = 2