Respuestas

2013-04-08T17:36:45+02:00

x= biletes de 20

y= billetes de 50

   

x +y = 11

 

20x + 50y = 370

20x + 20y + 30y = 370

20(x+y) + 30y =370

20(11) + 30y = 370

220 + 30y = 370

30y = 150

y= 5

 

x + 5 = 11

x= 6