Răspuns :
x+y+z =18.50
x=y/3
z=y+1
y/3+y+(y+1)=18.50
y+3y+3y+3=18.50*3
7y=52.50
y=7.5
x=7.5/3=2.5
z=7.5+1=8.5
Facem proba
7.5+2.5+8.5=10+8.5=18.50
x=y/3
z=y+1
y/3+y+(y+1)=18.50
y+3y+3y+3=18.50*3
7y=52.50
y=7.5
x=7.5/3=2.5
z=7.5+1=8.5
Facem proba
7.5+2.5+8.5=10+8.5=18.50