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Sagot :

VINS

bonjour

aire totale  = 9 x

aire verte  = 3 ( x - 5 ) =  3 x - 15

aire violette  = 9 x -  ( 3 x - 15 ) = 6 x  - 3 x + 15  = 3 x + 15

6 x + 15 = 50

6 x = 35

x = 35/6  

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