3x-2y=1 (1)y-2z=3 (2) 2y+z-3x=1 (3)由(1)得:x=(2y+1)/3 (4)由(2)得:z=(y-3)/2 (5)把(4)(5)代入(3)得:2y+(y-3)/2-3(2y+1)/3=14y+y-3-4y-2=2y=7所以x=5y=7z=2
x=5 y=7 z=2