Toán Lớp 7: Tìm x biết
1$\frac{2}{5}$ .x+$\frac{3}{7}$ =$\frac{-4}{5}$
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Toán Lớp 7: Tìm x biết
1$\frac{2}{5}$ .x+$\frac{3}{7}$ =$\frac{-4}{5}$
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