Verified answer

(98:14+х-9/24)*40=480

7+х-9/24=480:40

х+6 5/8=12

х=12-6 5/8

х=5 3/8

(98:14+х-9/24)*40=480

7+х-0,375=480:40

х+6,625=12

х=12-6,625

х=5,375