4a+12-3a-3-6=

Solution for 4a+12-3a-3-6= equation:

Simplifying
4a + 12 + -3a + -3 + -6 = 0

Reorder the terms:
12 + -3 + -6 + 4a + -3a = 0

Combine like terms: 12 + -3 = 9
9 + -6 + 4a + -3a = 0

Combine like terms: 9 + -6 = 3
3 + 4a + -3a = 0

Combine like terms: 4a + -3a = 1a
3 + 1a = 0

Solving
3 + 1a = 0

Solving for variable 'a'.

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

Add '-3' to each side of the equation.
3 + -3 + 1a = 0 + -3

Combine like terms: 3 + -3 = 0
0 + 1a = 0 + -3
1a = 0 + -3

Combine like terms: 0 + -3 = -3
1a = -3

Divide each side by '1'.
a = -3

Simplifying
a = -3