9+3=e

Solution for 9+3=e equation:

Simplifying
9 + 3 = e

Combine like terms: 9 + 3 = 12
12 = e

Solving
12 = e

Solving for variable 'e'.

Move all terms containing e to the left, all other terms to the right.

Add '-1e' to each side of the equation.
12 + -1e = e + -1e

Combine like terms: e + -1e = 0
12 + -1e = 0

Add '-12' to each side of the equation.
12 + -12 + -1e = 0 + -12

Combine like terms: 12 + -12 = 0
0 + -1e = 0 + -12
-1e = 0 + -12

Combine like terms: 0 + -12 = -12
-1e = -12

Divide each side by '-1'.
e = 12

Simplifying
e = 12