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Sagot :

VINS

bonjour

BD/BA = BE /BC = DE/AC

x / 7 = 5 /8

⇔ 8 BD = 35 ⇔ BD = 35/8  = 4.375

(6 -  x ) /6  = 5 /9

- 9 x + 54 = 30

- 9 x = 30 - 54

- 9 x = - 24

x = 24/9 = 8/3

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