Ответ:

Пошаговое объяснение:

48 + y : 6 = 95

y : 6 = 95 - 48

y : 6 = 47

y = 47 * 6

y = 282

720 - x = 90 * 2

720 - x = 180

x = 720 - 180

x = 540

80 - (7 + x) = 53

7 + x = 80 - 53

7 + x = 27

x = 27 - 7

x = 20

(x - 12 ) * 8 = 56

x - 12 = 56 : 8

x - 12 = 7

x = 7 + 12

x = 19