(9-3g)-(3+12g)=

Solution for (9-3g)-(3+12g)= equation:

Simplifying
(9 + -3g) + -1(3 + 12g) = 0

Remove parenthesis around (9 + -3g)
9 + -3g + -1(3 + 12g) = 0
9 + -3g + (3 * -1 + 12g * -1) = 0
9 + -3g + (-3 + -12g) = 0

Reorder the terms:
9 + -3 + -3g + -12g = 0

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

Combine like terms: -3g + -12g = -15g
6 + -15g = 0

Solving
6 + -15g = 0

Solving for variable 'g'.

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

Add '-6' to each side of the equation.
6 + -6 + -15g = 0 + -6

Combine like terms: 6 + -6 = 0
0 + -15g = 0 + -6
-15g = 0 + -6

Combine like terms: 0 + -6 = -6
-15g = -6

Divide each side by '-15'.
g = 0.4

Simplifying
g = 0.4