Explicație pas cu pas:
[tex]\frac{3x}{2} =\frac{2y}{3}=\frac{18}{z} =k\\x=\frac{2}{3} k\\y=\frac{3}{2} k\\z=18k\\\frac{2}{3}k*\frac{3}{2} k*18k\\1*18k=18k=XYZ[/tex]
