Which properties were used to solve the following problem?

25 (2x) + 25 (3y)

(25 * 2) x + (25 * 3) y

(2 * 25) x + (3 * 25) y

50x + 75y

Step-by-step explanation:

25 (2x) + 25 (3y)

25 · (2 · x) + 25 · (3 · y)

(25 · 2) · x + (25 · 3) · y Associative property (a · b) · c = a · (b · c)

(25 · 2) x + (25 · 3) y

(2 · 25) x + (3 · 25) y Commutative property a · b = b · a

50x + 75y