" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
10% - x-10
x
2l-
15% -15-x
½=15-x/x-10
x-10=2(15-x)
x-10=30-2x
3x=40
x≈13,3%