2a-(1-a)=-a

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

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

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

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

Solving
-1 + 3a = -1a

Solving for variable 'a'.

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

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

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

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

Add '1' to each side of the equation.
-1 + 1 + 4a = 0 + 1

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

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

Divide each side by '4'.
a = 0.25

Simplifying
a = 0.25