" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
(a+2/3a)-1/3(a+2/3a)=100
5/3a-5/9a=100
10/9a=100
a=100*9/10
a=90
ta liczba to 90