Three more translates to:
+ 3
the quotient of a number and three translates as follows:
a number is unknown = x
quotient means divide
is means equal
Putting it together we get the equation:
(x / 3) + 3 = 9
(x / 3) = 6 (subtract 3 from both sides)
x = 18 (multiply both sides by 3)
Substituting our answer back into the equation
(18 / 3) + 3 = 6 + 3 = 9 checks
The answer is 18