-33-72=a

Solution for -33-72=a equation:

Simplifying
-33 + -72 = a

Combine like terms: -33 + -72 = -105
-105 = a

Solving
-105 = a

Solving for variable 'a'.

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

Add '-1a' to each side of the equation.
-105 + -1a = a + -1a

Combine like terms: a + -1a = 0
-105 + -1a = 0

Add '105' to each side of the equation.
-105 + 105 + -1a = 0 + 105

Combine like terms: -105 + 105 = 0
0 + -1a = 0 + 105
-1a = 0 + 105

Combine like terms: 0 + 105 = 105
-1a = 105

Divide each side by '-1'.
a = -105

Simplifying
a = -105