Реши уравнения. x × 20 = 40 80 – x = 10 60 : x = 10

x × 20 = 40

x = 40 : 20

x = 2

80 – x = 10

x = 80 – 10

x = 70

60 : x = 10

x = 60 : 10

x = 6