va rog day coroana plus inima

Răspuns:
Explicație pas cu pas:
x/2=y/3=z/5=k inseamna ca x,y,z direct proportionale cu 2,3,5
x=2k
y=3k
z=5k
x+y=5k
y+z=8k
5k= p/100*8k
5=(p/100)*8
p= 62,5
Răspuns:
[tex](x,y,z)d.p.(2,3,5)\\\\x/2=y/3=z/5=k\\\\x=2k\\\\y=3k\\\\z=5k\\\\x+y=p/100*(y+z)\\\\100*(x+y)=p*(y+z)\\\\100*(2k+3k)=p*(3k+5k)\\\\500k=p*8k\\\\p=500k/8k= > p=62,5[/tex]