Mathematics
Undergraduate
次の連立方程式を解け。
(2)x+y-z=1,2x+y-z=6,3x+7y-7z=-13
大学の代数学問題なんですが，どうしても(2)だけ解けません😭だれか教えてください。仮定と結果知りたいです
6) は x,y,zについての方程式とみな
x+y-z = 1
2x+y -z = 6
3x + 7y-7z = −13
(2
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