-11=4a+2(-2+a)+(-1-a-(-2+a))

Solution for -11=4a+2(-2+a)+(-1-a-(-2+a)) equation:

Simplifying
-11 = 4a + 2(-2 + a) + (-1 + -1a + -1(-2 + a))
-11 = 4a + (-2 * 2 + a * 2) + (-1 + -1a + -1(-2 + a))
-11 = 4a + (-4 + 2a) + (-1 + -1a + -1(-2 + a))
-11 = 4a + -4 + 2a + (-1 + -1a + (-2 * -1 + a * -1))
-11 = 4a + -4 + 2a + (-1 + -1a + (2 + -1a))

Reorder the terms:
-11 = 4a + -4 + 2a + (-1 + 2 + -1a + -1a)

Combine like terms: -1 + 2 = 1
-11 = 4a + -4 + 2a + (1 + -1a + -1a)

Combine like terms: -1a + -1a = -2a
-11 = 4a + -4 + 2a + (1 + -2a)

Remove parenthesis around (1 + -2a)
-11 = 4a + -4 + 2a + 1 + -2a

Reorder the terms:
-11 = -4 + 1 + 4a + 2a + -2a

Combine like terms: -4 + 1 = -3
-11 = -3 + 4a + 2a + -2a

Combine like terms: 4a + 2a = 6a
-11 = -3 + 6a + -2a

Combine like terms: 6a + -2a = 4a
-11 = -3 + 4a

Solving
-11 = -3 + 4a

Solving for variable 'a'.

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

Add '-4a' to each side of the equation.
-11 + -4a = -3 + 4a + -4a

Combine like terms: 4a + -4a = 0
-11 + -4a = -3 + 0
-11 + -4a = -3

Add '11' to each side of the equation.
-11 + 11 + -4a = -3 + 11

Combine like terms: -11 + 11 = 0
0 + -4a = -3 + 11
-4a = -3 + 11

Combine like terms: -3 + 11 = 8
-4a = 8

Divide each side by '-4'.
a = -2

Simplifying
a = -2