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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 7: Bài 5: Cho $\Delta{ABC}$ có $\widehat{B}$ = $\widehat{C}$ = 40^0, BD là tia phân giác của $\widehat{BAC}$ CMR : $\text{ BD + AD = BC }$ Cần giúp đỡ nhanhhhhhh ( helpppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppp meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee) ...

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