3(4a-a)-12=

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

Simplifying
3(4a + -1a) + -12 = 0

Combine like terms: 4a + -1a = 3a
3(3a) + -12 = 0

Remove parenthesis around (3a)
3 * 3a + -12 = 0

Multiply 3 * 3
9a + -12 = 0

Reorder the terms:
-12 + 9a = 0

Solving
-12 + 9a = 0

Solving for variable 'a'.

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

Add '12' to each side of the equation.
-12 + 12 + 9a = 0 + 12

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

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

Divide each side by '9'.
a = 1.333333333

Simplifying
a = 1.333333333