It is the commutative property since you can switch 5 and 4 around but still get the same answer (9).
Answer:
volume
Step-by-step explanation:
imagine a cube, think of fitting people in a closed 'space'
Let r be the number of cards Ron has.
r + 2r + 4 = 97
3r + 4 = 97
3r + 4 - 4 = 97 - 4
3r = 93
3/3r = 93/3
r = 31
Ron has a total of 31 cards and Jason has a total of 66 cards.