Question

Determinati numerele x,y, z stiind ca x+y+z=27,xsupra 3 este egal cu y supra 4 si y supra 6 este egal cu z supra 3

Answer 1

x+y+z=27
x/3=y/4
x=3y/4
y/6=z/3 |*3
z=y/2
3y/4+y+y/2=27 |
3y/4+4y/4+2y/4=108/4
3y+4y+2y=108
9y=108
y=12
===>x=12*3/4
         x=9
         z=y/2
         z=6
Verificare:
12+9+6=27