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数学
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x+y+z=4x-5y=y-x+6z,xyz不等0,x:y:z=?
人气:195 ℃ 时间:2020-03-07 13:21:33
解答
x+y+z=4x-5y=y-x+6z
x+y+z=y-x+6z
2x=5z,x=5z/2,
代入
x+y+z=4x-5y
5z/2+y+z=4*5z/2-5y
6y=13z/2,y=13z/12
xyz不等0,
所以x:y:z=(5z/2):(13z/12):z=30:13:12.
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