a+8+-2(a+-12)=0

Solution for a+8+-2(a+-12)=0 equation:

Simplifying
a + 8 + -2(a + -12) = 0

Reorder the terms:
a + 8 + -2(-12 + a) = 0
a + 8 + (-12 * -2 + a * -2) = 0
a + 8 + (24 + -2a) = 0

Reorder the terms:
8 + 24 + a + -2a = 0

Combine like terms: 8 + 24 = 32
32 + a + -2a = 0

Combine like terms: a + -2a = -1a
32 + -1a = 0

Solving
32 + -1a = 0

Solving for variable 'a'.

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

Add '-32' to each side of the equation.
32 + -32 + -1a = 0 + -32

Combine like terms: 32 + -32 = 0
0 + -1a = 0 + -32
-1a = 0 + -32

Combine like terms: 0 + -32 = -32
-1a = -32

Divide each side by '-1'.
a = 32

Simplifying
a = 32