" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
entonces, x=84-y
4,5x+3,6y=310,5
entonces, x=310,5-3,6y/4,5
igualamos:
x=x
84-y=310,5-3,6y/4,5
4,5(84-y)=310,5-3,6y
378-4,5y=310,5-3,6y
378-310=4,5y-3,6y
68=0,9y
68/0,9=y
75,6=y
vendio 75,5 libros de un tipo y 8,5 libros de otro tipo