bonjour
largeur = x
longueur = 3 x + 12
2 ( x + 3 x + 12 ) = 192
2 x + 6 x + 24 = 192
8 x = 192 - 24
8 x = 168
x = 21
largeur = 21 m
longueur = 3 *21 + 12 = 75 m
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bonjour
largeur = x
longueur = 3 x + 12
2 ( x + 3 x + 12 ) = 192
2 x + 6 x + 24 = 192
8 x = 192 - 24
8 x = 168
x = 21
largeur = 21 m
longueur = 3 *21 + 12 = 75 m