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khongten7ahaz
2 năm trước
Một cửa hàng có một số mét vải đỏ và vải hoa, trong đó số mét vải đỏ bằng $\frac{1}{5}$ toàn bộ số vải của cửa hàng. Sau khi cửa hàng bán đi 30m vải đỏ thì mét vải đỏ còn lại bằng $\frac{1}{10}$ số mét vải hoa. Hỏi lúc đầu cửa hàng có bao nhiêu mét vải?
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