13+71=a

Solution for 13+71=a equation:

Simplifying
13 + 71 = a

Combine like terms: 13 + 71 = 84
84 = a

Solving
84 = 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.
84 + -1a = a + -1a

Combine like terms: a + -1a = 0
84 + -1a = 0

Add '-84' to each side of the equation.
84 + -84 + -1a = 0 + -84

Combine like terms: 84 + -84 = 0
0 + -1a = 0 + -84
-1a = 0 + -84

Combine like terms: 0 + -84 = -84
-1a = -84

Divide each side by '-1'.
a = 84

Simplifying
a = 84