Bonjour;
l = x
L = 2x
x+x+2x+2x = 120
6x = 120
x = 120/6
x =20
l = 20
L = 2*20 => 40cm
Explications étape par étape:
longueur = 2x
largeur = x
(x + 2x) × 2 = 120cm
3x × 2 = 120
x = 120/6 = 20cm
Largeur = 20cm
Longueur = 20× 2 = 40cm.
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Bonjour;
l = x
L = 2x
x+x+2x+2x = 120
6x = 120
x = 120/6
x =20
l = 20
L = 2*20 => 40cm
Explications étape par étape:
longueur = 2x
largeur = x
(x + 2x) × 2 = 120cm
3x × 2 = 120
6x = 120
x = 120/6 = 20cm
Largeur = 20cm
Longueur = 20× 2 = 40cm.