" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
compra 12
4 cuadernos = 45 soles
entonces
12 cuadernos = 135 soles
lo vende a 3 cuadernos = 50 soles
ganancia x = 6500
x : cuadernos
3/50 = x/6500
x = 390 cuadernos