bonjour
largeur = x
longueur = 3 x
2 ( x + 3 x ) = 80
2 x + 6 x = 80
8 x = 80
x = 10
largeur = 10 et longueur = 30
aire = 10*30 = 300 m²
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bonjour
largeur = x
longueur = 3 x
2 ( x + 3 x ) = 80
2 x + 6 x = 80
8 x = 80
x = 10
largeur = 10 et longueur = 30
aire = 10*30 = 300 m²