Question

Aflati x,y,z stiind ca x reprezinta 25% din y si 20% din z iar x+y+z =30

Answer 1

x=25%y y=100x/25 =4x x=20%z z=100x/20 =5x x+y+z=30 x+4x+5x=30 10x=30 x=3 y=4*3=12 z=5*3=15