6x +6y=1/3 2y+ 2z=1/6 5(x+ y+ z)=1/2
人气:292 ℃ 时间:2020-02-03 01:49:04
解答
x加y加z=1/10
y加z=1/12
x=1/60
x加y=1/18
y=7/180
Z=8/180
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