42=a-26

Solution for 42=a-26 equation:

Simplifying
42 = a + -26

Reorder the terms:
42 = -26 + a

Solving
42 = -26 + 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.
42 + -1a = -26 + a + -1a

Combine like terms: a + -1a = 0
42 + -1a = -26 + 0
42 + -1a = -26

Add '-42' to each side of the equation.
42 + -42 + -1a = -26 + -42

Combine like terms: 42 + -42 = 0
0 + -1a = -26 + -42
-1a = -26 + -42

Combine like terms: -26 + -42 = -68
-1a = -68

Divide each side by '-1'.
a = 68

Simplifying
a = 68