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dangthuynhi.010101
2 năm trước
Bài 3: Tìm x: X a) x : 3,6 = 4,5 b) 6,36 x X +13,64 x X-20 Bai4:.Một ô tô và một xe máy xuất phát cùng một lúc từ A đến B. Quãng đường AB dài 75km. Biết thời gian xe máy đi là 2,5 giờ và vận tốc xe máy bằng 3/5 vận tốc oto Tính vận tốc của xe máy và thời gian ô tô đi từ A đến B. Các bạn làm hộ mình với
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