See below for solution. Hope this is helpful
Answer:
1. its substitution
2.
3. order of operations
4. variable
5. equation
Step-by-step explanation:
We have

of 252 people who have a personalized black disc
Number of people who would have personalized flying disc =

people
Then we work out the number of people who like to play disc golf:

people
So we have 15 people who like to play disc golf and have personalised black disc.