WILL GIVE BRAINLIEST PLZZZ HELP Which of the following problems can be solved using the equation x-9=15
a. The sum of two numbers is 15. If one of the numbers is 9, what is x, the other number?

b. David’s portion of the bill is $9 more than Jaleel’s portion of the bill. If Jaleel pays $9, find x, the amount in dollars that David pays.

c. Allison is 9 years younger than her sister Pam. Allison is 15 years old. What is x, Pam’s age?

D. Calvin owns 15 CDs. If he gave 9 of them to a friend, what is x, the number of CDs he has left?