Respuesta :
Let H be hamburger and C be chesseburger.
H+C=559
H+59=C
H+(H+59)=559
2H+59+559
2H=559-59
2H=500
H=500/2
H=250
250 hamburgers were sold on Saturday.
H+C=559
H+59=C
H+(H+59)=559
2H+59+559
2H=559-59
2H=500
H=500/2
H=250
250 hamburgers were sold on Saturday.