-(a-3)=-2a-3

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

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

Reorder the terms:
-1(-3 + a) = -2a + -3
(-3 * -1 + a * -1) = -2a + -3
(3 + -1a) = -2a + -3

Reorder the terms:
3 + -1a = -3 + -2a

Solving
3 + -1a = -3 + -2a

Solving for variable 'a'.

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

Add '2a' to each side of the equation.
3 + -1a + 2a = -3 + -2a + 2a

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

Combine like terms: -2a + 2a = 0
3 + 1a = -3 + 0
3 + 1a = -3

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

Combine like terms: 3 + -3 = 0
0 + 1a = -3 + -3
1a = -3 + -3

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

Divide each side by '1'.
a = -6

Simplifying
a = -6