已知x+3y/3=2y+3z/4=2z+2x/5,则x:y:z=( )如题
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已知x+3y/3=2y+3z/4=2z+2x/5,则x:y:z=( )如题
已知x+3y/3=2y+3z/4=2z+2x/5,则x:y:z=( )如题
已知x+3y/3=2y+3z/4=2z+2x/5,则x:y:z=( )如题
20X+60Y=30Y+45Z=24Z+24X 左边那个等式可得30Y=45Z-20X,右边那个等式可得30Y=24X-21Z 所以45Z-20X=24X-21Z 所以66Z=44X,X:Z=3:2,再把Z=2/3X这个关系式带入上述的左边的等式,可得X:Y=3:1 所以X:Y:Z=3:1:2
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