Sagot :
Bonjour,
Léo: x
Lison: x+4
Loïc: 3(x+4) = 3x+12
x+x+4 +3x+12 = 72
5x = 72 - 4- 12
5x= 56
x= 56/5
x= 11,20
Léo: 11,20€
Lison: 11,20+4 =>15,20€
Loïc: 15,20*3 =>45,60€
Réponse:
x = argent de Leo
y = argent de Lison
z = argent de Loïc
x+y+z = 72
y = x + 4
z = 3*y
x+y+z = 72
<=> x + (x+4) + 3(x+4) = 72
<=> x + x+4 + 3x+12 =72
<=> 5x + 16 = 72
<=> 5x = 56
<=> x=56/5
<=> x=11.2
Léo à 11.2€