-3(2-a)-a=1

Solution for -3(2-a)-a=1 equation:

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

Combine like terms: 3a + -1a = 2a
-6 + 2a = 1

Solving
-6 + 2a = 1

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 + 2a = 1 + 6

Combine like terms: -6 + 6 = 0
0 + 2a = 1 + 6
2a = 1 + 6

Combine like terms: 1 + 6 = 7
2a = 7

Divide each side by '2'.
a = 3.5

Simplifying
a = 3.5