Answer:
Step-by-step explanation:
The difference between 18 and 9
18 - 9 = 9
Divide 21 by the difference between 18 and 9
21 / (18 - 9)
21 / 9
Answer: 2 remainder 3
Step-by-step explanation: First, subtract 18 from 9.
18 - 9 = 9
Then do 9 divided 21.