" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
y=ilość 2 metalu
x+y=135g
20%x+25%y=30h
x=135-y
0,2(135-y)+0,25y=30
27-0,2y+0,25y=30
0,05y=30-27
0,05y=3
y=3:0,05
y=60g
x=135-60=75g
odp. pierwszego metalu było 75 a drugiego 60 gram