5 ∶ 3⇒ z = (3/5) × yTotal RUN scored = 1584⇒ x + y + z = 1584⇒ (4/3) × y + y + (3/5) × y = 1584⇒ y = 540⇒ x = (4/3) × y = (4/3) × 540 = 720Runs scored by x = 720.