X+Y+Z=352X=Y+51/3Y=1/2Z
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X+Y+Z=352X=Y+51/3Y=1/2Z
X+Y+Z=35
2X=Y+5
1/3Y=1/2Z
X+Y+Z=352X=Y+51/3Y=1/2Z
由1/3Y=1/2Z可知Z=2/3Y,由2X=Y+5可知X=1/2(Y+5)代入X+Y+Z=35中
解:
X=(Y+5)/2
Z=(2/3)Y
带入第一个方程得
(Y+5)/2+(2/3)Y=35
解得:
Y=225/7
X=130/7
Z=150/7
X+Y+Z=352X=Y+51/3Y=1/2Z
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