9=5+a

Solution for 9=5+a equation:

Simplifying
9 = 5 + a

Solving
9 = 5 + 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.
9 + -1a = 5 + a + -1a

Combine like terms: a + -1a = 0
9 + -1a = 5 + 0
9 + -1a = 5

Add '-9' to each side of the equation.
9 + -9 + -1a = 5 + -9

Combine like terms: 9 + -9 = 0
0 + -1a = 5 + -9
-1a = 5 + -9

Combine like terms: 5 + -9 = -4
-1a = -4

Divide each side by '-1'.
a = 4

Simplifying
a = 4