bài 1 . âm 5 nhân mở ngoặc âm 5 đóng ngoặc nhân mở ngoặc âm 5 nhân mở ngoặc âm 5 đóng ngoặc nhân mở ngoặc âm 5 đóng ngoặc b. mở ngoặc âm 2 đóng ngoặc mũ 4 c. 78- mở ngoặc âm 314 đóng ngoặc âm 357 cộng 38 d. 29. mở ngoặc 29 trừ 23 đóng ngoặc trừ 29 nhân mở ngoặc 28 trừ 23 đóng ngoặc e. âm 28 nhân 56 cộng mở ngoặc âm 44 đóng ngoặc nhân 28 bái 2 a. 3x cộng 37 = 16 b. 18 trừ 5x = - 12 c. 3x - 15 = 2x - 14 d. giá trị tuyệt đối x cộng 1 đóng giá trị tuyêt đối mình cho nhất và 5 sao na

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