(1,5đ) Tìm x a) x + 25 = 50 b) x – 17 = 49 c) 51 – x = 27

Tìm x

a) x + 25 = 50

        x = 50 – 25

        x = 25

b) x – 17 = 49

        x = 49 + 17

        x = 66

c) 51 – x = 27

        x = 51 – 27

        x = 24