" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
y - wiek córki
x = 7y
x +20 = 2y
x=7y
7y+20=2y
5y=20 /5
x=7y
y = 4
x = 28
odp : Pani ma teraz 28 lat
y- wiek pani
7x=y
y+20=2x |-20
7x=y
y=2x-20
7x=2x-20 |-2x
5x=-20 | :5
x=4
7x=y
7*4=y
y=28
x=4
prosze ;p