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

Solution for 9(a+2)-3(4-a)= equation:

Simplifying
9(a + 2) + -3(4 + -1a) = 0

Reorder the terms:
9(2 + a) + -3(4 + -1a) = 0
(2 * 9 + a * 9) + -3(4 + -1a) = 0
(18 + 9a) + -3(4 + -1a) = 0
18 + 9a + (4 * -3 + -1a * -3) = 0
18 + 9a + (-12 + 3a) = 0

Reorder the terms:
18 + -12 + 9a + 3a = 0

Combine like terms: 18 + -12 = 6
6 + 9a + 3a = 0

Combine like terms: 9a + 3a = 12a
6 + 12a = 0

Solving
6 + 12a = 0

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 + 12a = 0 + -6

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

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

Divide each side by '12'.
a = -0.5

Simplifying
a = -0.5