173=a-(-79)

Solution for 173=a-(-79) equation:

Simplifying
173 = a + -1(-79)

Multiply -1 * -79
173 = a + 79

Reorder the terms:
173 = 79 + a

Solving
173 = 79 + 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.
173 + -1a = 79 + a + -1a

Combine like terms: a + -1a = 0
173 + -1a = 79 + 0
173 + -1a = 79

Add '-173' to each side of the equation.
173 + -173 + -1a = 79 + -173

Combine like terms: 173 + -173 = 0
0 + -1a = 79 + -173
-1a = 79 + -173

Combine like terms: 79 + -173 = -94
-1a = -94

Divide each side by '-1'.
a = 94

Simplifying
a = 94