Réponses

  • Utilisateur Brainly
2014-05-04T15:06:37+02:00
X = les pieces de 0,20c
(200-x) = les pieces de 0,50c

0,20x+0,50(200-x) = 52,30
0,20x+100-0,50x = 52,30
-0,30x = -100+52,30
-0,30x = -47,70
x = 159 pieces de 0,20

200-159 = 41 pieces de 0,50c

verif :
(159*0,20 + 41*0,50) = 52,30e