Question

Urgent ex. însemnate dau coroana​

Answer 1

Răspuns:

Prb 28

(X+Y+Z) /3=16. Rezulta ca x+y+z=48

x/4=y/5=z/7=k

x/4=k. X=4k

Y/5=k. Y=5k

Z/7=k. Z=7k

X+y+z=48

4k+5k+7k=48

K(4+5+7)=48

K*16=48

K=48:16

K=3

X=k*4

X=3*4

X=12

Y=15

Z=21