x+y+z=6 (1)2x-y=4z (2)1/3x-y+z=0 (3)(1)+(2) (1)+(3)3x-3z=6 (4)4/3x+2z=6 (5)(4)x2+(5)x36x+4x=12+1810x=30x=33x-3z=6z=1x+y+z=63+y+1=6y=2即x=3 y=2 z=1希望你能看懂，祝你学习进步
