5 = 7 B, (X - 129) × 4 = 36C, 786 – X = 5 × 4

Câu 2: Tìm x:a, ( x – 266) : 5 = 7 b, (x - 129) × 4 = 36c, 786 – x = 5 × 4 : 2 d, x + 24 : 4 × 3 = 285