3(4a+2)-3a=-12

Solution for 3(4a+2)-3a=-12 equation:

Simplifying
3(4a + 2) + -3a = -12

Reorder the terms:
3(2 + 4a) + -3a = -12
(2 * 3 + 4a * 3) + -3a = -12
(6 + 12a) + -3a = -12

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

Solving
6 + 9a = -12

Solving for variable 'a'.

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

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

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

Combine like terms: -12 + -6 = -18
9a = -18

Divide each side by '9'.
a = -2

Simplifying
a = -2