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Câu 1. Giải phương trình: 7- (2x +4) =-(x+4) A. S={6} B. S={7} C. S={8} D. S={9} Câu 2 . Giải phương trình : x + 2x+ 3x – 19 =3x+5 A. S={6} B. S={7} C. S= {8} D. S={9} Câu 3. Giải phương trình : x- 12 + 4x = 25+ 2x - 1 A. S={13} B. S={10} C. S= {11} D. S={12} Câu 4. Giải phương trình : 8x – 3 = 5x + 12 A. S={8} B. S={3} C. S= {5} D. S={0} Câu 5 . Giải phương trình : 7+ 2x = 22- 3x A. S={4} B. S={2} C. S= {3} D. S={1} mình cần cách giải và đáp án nha. 5*+ctlhn ngay và luôn
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