x-z=-4 z-2y=-1 x+y-z=-1 怎么解
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x-z=-4z-2y=-1x+y-z=-1怎么解x-z=-4z-2y=-1x+y-z=-1怎么解x-z=-4z-2y=-1x+y-z=-1怎么解A为x-z=-4B为z-2y=-1C为x+y-z=-1A
x-z=-4 z-2y=-1 x+y-z=-1 怎么解
x-z=-4 z-2y=-1 x+y-z=-1 怎么解
x-z=-4 z-2y=-1 x+y-z=-1 怎么解
A为x-z=-4 B为z-2y=-1 C为x+y-z=-1
A-C为y=3
把y=3代入B中得z=7
把z=7代入A中得x=3
x=3 y=3 z=7
希望采纳 绝对正确 !
我都验算了的
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