x/2-y+z=0 (1)

2x+y/3+z=2 (2)

x+y+z=-4 (3)

Add (1) and (3)

3/2*x+2z =- 4

Add (1) and 3*(2)

13/2x+4z = 6

3x+4z = -8

7/2x = 14

x= 14*2/7 =4

12+4z=-8

4z =-8-12 = -5

z =-5

x+y+z=-4

4+y-5 = -4

y = -4+5-4 =5-8 =-3

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