" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
x - y = 12.....(ii)
2x = 42
x = 21
el valor x lo renplazamos en (i)
21 + y = 30
y = 30- 21
y = 9
La diferencia es 21-9=12