Answer:
The "number" is 63
Step-by-step explanation:
"the quotient of a number, x, and 3" means x/3
"Six less than" means -6
This leads to "Six less than the quotient of a number and 3" means x/3 - 6
"is 15" means = 15
Therefore: x/3 - 6 = 15
x/3 = 21
x = 63
