bonjour
x + 5 x /9 = 2 100
9 x /9 + 5 x / 9 = 18 900 /9
9 x + 5 x = 1 8900
14 x = 18 900
x = 1 350
longueur = 1 350
largeur = 750
aire = 1 012 500 m²
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bonjour
x + 5 x /9 = 2 100
9 x /9 + 5 x / 9 = 18 900 /9
9 x + 5 x = 1 8900
14 x = 18 900
x = 1 350
longueur = 1 350
largeur = 750
aire = 1 012 500 m²