Answer: Jack rented 10 DVDs.
Paloma rented 5 DVDs.
Grace rented 1 Dvd
Step-by-step explanation:
Let x represent the number of DVD's that Jack rented.
Let y represent the number of DVD's that Paloma rented.
Let z represent the number of DVD's that Grace rented.
Jack rented 2 times as many DVD's as Paloma last month. This means that
x = 2y
Paloma rented 4 more than grace. This means that
z = y - 4
Paloma rented 4 fewer than Greg. If
Greg rented 9 DVD's, it means that
y = 9 - 4 = 5
x = 2y = 2 × 5
x = 10
z = y - 4 = 5 - 4
z = 1
