已知2x+3y-4z=0,3x+4y+5z=0,且xyz≠0RT求x+y+z/x-y+z的值
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已知2x+3y-4z=0,3x+4y+5z=0,且xyz≠0RT求x+y+z/x-y+z的值
已知2x+3y-4z=0,3x+4y+5z=0,且xyz≠0
RT求x+y+z/x-y+z的值
已知2x+3y-4z=0,3x+4y+5z=0,且xyz≠0RT求x+y+z/x-y+z的值
先约去x?6x+9y=12z?6x+8y=-10z?得y=22z?再约去y?8x+12y=16z?9x+12y=-15z?得x=-31z?把x和y的值代入你的式子里就可以算出得2/13
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已知2x+3y-4z=0,3x+3y+5z=0,求x+y+x/x-y+z的值
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