Tìm x: 25 – 3.(6 – x) = 22, [(2x – 11):3 + 1].5 = 20, (25 - 2x)3 : 5 - 32 = 42, 2.3x = 10.312 + 8.274

ài 2 (2 điểm): Tìm x

a) 25 – 3.(6 – x) = 22

b) [(2x – 11):3 + 1].5 = 20

c) (25 - 2x)3 : 5 - 32 = 42

d) 2.3x = 10.312 + 8.274