distribute 2 throughout the set of parenthesis on the right
(e+24) + 9 = 2e + 18
add 24 and 9 on the left side
e + 33 = 2e +18
subtract 33 on both sides of the equation
e = 2e - 15
subtract 2e on both sides of the equation
-e = -15
divide by -1
e = 15
