(1)+(2)+(3)得
2x+2y+2z=2/5
∴x+y+z=1/5 (4)
(4)-(2)得
x=1/10
(4)-(3)得
y=1/15
(4)-(1)得
z=1/30
x+y=1/6 y+z=1/10 x+z=2/15
2个回答
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