	huyen \| Chat Online
	22/05/2022 21:03:38
	Toán học - Lớp 4 \| Toán học \| Lớp 4

Tìm y biết rằng

y x 3/7 = 1 y : 2/3 - 2/5 =1 y x 3 - 5/4 = 3
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