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Tìm giá trị của m để 2 đg thẳng (d1) mx + 3y = 10; (d2) x-2y=4 cắt nhau tại 1 điểm trên trục hoành (Ox) P/s: Giúp em chỉ ra phương pháp làm thôi cũng ok ạ Em c.ơn ♥
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