已知X+Y+Z=3Y=2Z,求X+Y+Z分之X的值求X\(X+Y+Z)
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已知X+Y+Z=3Y=2Z,求X+Y+Z分之X的值求X\(X+Y+Z)
已知X+Y+Z=3Y=2Z,求X+Y+Z分之X的值
求X\(X+Y+Z)
已知X+Y+Z=3Y=2Z,求X+Y+Z分之X的值求X\(X+Y+Z)
6
X+Y+Z=3Y=2Z
x+z=2y
z+y=z
3x=z,2x=y
X+Y+Z=6x
由于X+Y+Z=3Y=2Z知道:
z=3y/2
x=y/2
所以x/(X+Y+Z)=(y/2)/3y=1/6
X+Y+Z=3Y=2Z
Z=3/2Y
X+Y+3/2Y=3Y
X/Y=1/2
X/(X+Y+Z)=X/3Y=1/3*1/2=1/6