Réponses

  • Utilisateur Brainly
2014-09-03T17:37:11+02:00
X = 3/4 - 2/3 x 15/8
x = 3/4 - (2 * 15/(3 * 8) 
x = 3/4 - 30/24
x = (3 * 6)/(4 * 6) - 30/24
x = 18/24 - 30/24
x = - 12/24
x = - 1/2

y = 6/5 - 7/14 : 5/7
y = 6/5 - 1/2 x 7/5
y = 6/5 - 7/10
y = 12/10 - 7/10
y = 5/10
y = 1/2

z = (5/2 - 7/4) : 3/8
z = (10/4 - 7/4) : 3/8
z = 3/4 : 3/8
z = 3/4 x 8/3
z = 24/12
z = 2