Cevap:
2x=x-2y ise x=-2y ise 2y=-x
z=2y-2z ise 3z=2y........o zmn
2y=3z=-x=k dersek
y=k/2, z=k/3, x=-k..... Soruda yerine yaz
4*k/2-3*(-k)/2*(k/3)
(2k+3k):2k/3
5k:2k/3=5k*3/2k=15k/2k=15/2
