x/2=y/3=z/4,2x+y-z=6 解此方程组
人气:153 ℃ 时间:2019-12-27 09:28:11
解答
x/2=y/3=z/4,
6x=4y=3z
2x+y-z=6
6x+3y-3z=3y=18
y=6
x=4
z=8
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