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nguyenminhcong4321
2 năm trước
làm nhanh giúp mik ạ TÌm x $\frac{x+2}{12}$ + $\frac{x+2}{13}$ + $\frac{x+2}{14}$ = $\frac{x+2}{15}$ + $\frac{x+2}{16}$
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