2分之x等于3分之y等于4分之z不等于0.求3x+2y-z分之x-y-z的值

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设x/轿猜2=y/3=z/4=k
则x=2k y=3k z=4k
3x+2y-z分之x-y-z
=(x-y-z)/(3x+2y-z)
=(2k-3k-4k)/(3*2k+2*3k-4k)
=(-5k)/(8k)
=-5/8 呵呵。此帆滚我也在森余做这道题。

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3x+2y-z分之x-y-z= -5/8
2，3，4的最小公倍数是12。歼冲慧所以，12分之6X=12分之4Y=12分之3Z，也就是6X=4Y=3Z.
6,4,3的判数最氏答小公倍数也是12，所以6X=4Y=3Z也等于6*2=4*3=3*4=12，所以X=2,Y=3,Z=4.
请验证是否对。

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x/2=y/3=z/4
则：x=(2/3)y，z=(4/迟镇3)y
代入为：[(2/3)y-y-(4/3)y]/[3*(2/3)y+2y-(4/3)y]
=(2/指庆3-1-4/3)/(2+2-4/码逗粗3)
=-5/8

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设x/2=y/歼尺陪3=z/4=k
则困和x=2k y=3k z=4k
3x+2y-z分之x-y-z
=(x-y-z)/(3x+2y-z)
=(2k-3k-4k)/氏蠢(3*2k+2*3k-4k)
=(-5k)/(8k)
=-5/8
=-0.625

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