3(-1+2r)+9=

Solution for 3(-1+2r)+9= equation:

Simplifying
3(-1 + 2r) + 9 = 0
(-1 * 3 + 2r * 3) + 9 = 0
(-3 + 6r) + 9 = 0

Reorder the terms:
-3 + 9 + 6r = 0

Combine like terms: -3 + 9 = 6
6 + 6r = 0

Solving
6 + 6r = 0

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 + 6r = 0 + -6

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

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

Divide each side by '6'.
r = -1

Simplifying
r = -1