4. Реши уравнения. y-8 = 20 x + 27 = 30 64-x=64

y - 8 = 20

y = 20 + 8

y = 28

x + 27 = 30

x = 30 - 27

x = 3

64 - x = 64

x = 64 - 64

x = 0