" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
y=obecny wiek córki
x-5=5(y-5)
x+10=2(y+10)
x-5=5y-25
x+10=2y+20
x=5y-20
5y-20-2y=20-10
3y=10+20
3y=30
y=30:3
y=10
x=5×10-20=50-20=30
pani zuzanna ma obecnie30lat