30+13=a

Solution for 30+13=a equation:

Simplifying
30 + 13 = a

Combine like terms: 30 + 13 = 43
43 = a

Solving
43 = 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.
43 + -1a = a + -1a

Combine like terms: a + -1a = 0
43 + -1a = 0

Add '-43' to each side of the equation.
43 + -43 + -1a = 0 + -43

Combine like terms: 43 + -43 = 0
0 + -1a = 0 + -43
-1a = 0 + -43

Combine like terms: 0 + -43 = -43
-1a = -43

Divide each side by '-1'.
a = 43

Simplifying
a = 43