Răspuns:
Explicație pas cu pas:
x/3=y/5=z/10=k
x=3k
y=5k
z=10k
x+y+z=72
3k+5k+10k=72
18k=72
k=72:18
k=4
x=3 ori 4=12
y= 5 ori 4=20
z=10 ori 4=40
x/3 = y/5 = z/10
x+y+z = 72
----------------------
x = 3y/5 ; z = 10y/5 = > z = 2y
3y/5 + ⁵⁾y + ⁵⁾2y = ⁵⁾72 =>
3y + 5y + 10y = 360 =>
18y = 360 => y = 360:18 => y = 20 =>
x = 12 ; z = 40
