Пошаговое объяснение:

16 + 48 ÷ z = 40

16 + 48/z = 40

48/z = 24

z = 2

320 ÷ (52 - x) = 8

320 / 52 - x = 8 l × 52

320 = 8(52 - x) l ÷ 8

x = 52 - 40

x = 12

50y - 72 = 78

50y = 78 + 72

50y = 150

y = 3

16+48:z=40. 320:(52-x)=8. 50×y-72=78

48:z=40-16 52-x=320:8. 50×y=78+72

48:z=24 52-x=40. 50×y=150

z=48:24 x=52-40. y=150÷50

z=2 x=12. y=3

16+48:1,6=40. 320:(52-12)=8. 50×30-72=78

40=40. 8=8. 78=78