2x=5y+3z (1)
且x-y=z (2)
由(2)z=x-y带入(1)有
2x=5y+3(x-y)
则y=-x/2
带入(2)有z=x-y=x-(-x/2)=3x/2
则x:y:z=x:(-x/2):(3x/2)=2:(-1):3
如果2x=5y+3z,且x-y=z,求x∶y∶z
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