-2(3-a)-a=4

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

Simplifying
-2(3 + -1a) + -1a = 4
(3 * -2 + -1a * -2) + -1a = 4
(-6 + 2a) + -1a = 4

Combine like terms: 2a + -1a = 1a
-6 + 1a = 4

Solving
-6 + 1a = 4

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 + 1a = 4 + 6

Combine like terms: -6 + 6 = 0
0 + 1a = 4 + 6
1a = 4 + 6

Combine like terms: 4 + 6 = 10
1a = 10

Divide each side by '1'.
a = 10

Simplifying
a = 10