18-(a-12)=

Solution for 18-(a-12)= equation:

Simplifying
18 + -1(a + -12) = 0

Reorder the terms:
18 + -1(-12 + a) = 0
18 + (-12 * -1 + a * -1) = 0
18 + (12 + -1a) = 0

Combine like terms: 18 + 12 = 30
30 + -1a = 0

Solving
30 + -1a = 0

Solving for variable 'a'.

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

Add '-30' to each side of the equation.
30 + -30 + -1a = 0 + -30

Combine like terms: 30 + -30 = 0
0 + -1a = 0 + -30
-1a = 0 + -30

Combine like terms: 0 + -30 = -30
-1a = -30

Divide each side by '-1'.
a = 30

Simplifying
a = 30