12-2(a-1)+5+a=

Solution for 12-2(a-1)+5+a= equation:

Simplifying
12 + -2(a + -1) + 5 + a = 0

Reorder the terms:
12 + -2(-1 + a) + 5 + a = 0
12 + (-1 * -2 + a * -2) + 5 + a = 0
12 + (2 + -2a) + 5 + a = 0

Reorder the terms:
12 + 2 + 5 + -2a + a = 0

Combine like terms: 12 + 2 = 14
14 + 5 + -2a + a = 0

Combine like terms: 14 + 5 = 19
19 + -2a + a = 0

Combine like terms: -2a + a = -1a
19 + -1a = 0

Solving
19 + -1a = 0

Solving for variable 'a'.

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

Add '-19' to each side of the equation.
19 + -19 + -1a = 0 + -19

Combine like terms: 19 + -19 = 0
0 + -1a = 0 + -19
-1a = 0 + -19

Combine like terms: 0 + -19 = -19
-1a = -19

Divide each side by '-1'.
a = 19

Simplifying
a = 19