(1)x+y+z=2 (2)x-z=-2 (3)y+z=1本人对三元一次方程组不会,解一个错一个!帮我算下这个等于多少?我算的Z=3

x=-5，y=4，z=3
（2）+（3）得x+y=-1（4）
代人（1）得z=3
将z=3代人（2）得x=1
将x=1代人（4）得y=-2
望采纳

不好意思，刚刚题目看错了

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