6x +6y=1/3 2y+ 2z=1/6 5(x+ y+ z)=1/2

问题描述:

6x +6y=1/3 2y+ 2z=1/6 5(x+ y+ z)=1/2

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