7(2r+6)-12r=

Solution for 7(2r+6)-12r= equation:

Simplifying
7(2r + 6) + -12r = 0

Reorder the terms:
7(6 + 2r) + -12r = 0
(6 * 7 + 2r * 7) + -12r = 0
(42 + 14r) + -12r = 0

Combine like terms: 14r + -12r = 2r
42 + 2r = 0

Solving
42 + 2r = 0

Solving for variable 'r'.

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

Add '-42' to each side of the equation.
42 + -42 + 2r = 0 + -42

Combine like terms: 42 + -42 = 0
0 + 2r = 0 + -42
2r = 0 + -42

Combine like terms: 0 + -42 = -42
2r = -42

Divide each side by '2'.
r = -21

Simplifying
r = -21