一只x/3=y/4=z/5,求x+y+z/x及x+y+z/x-y+z的值
来源：学生作业帮助网 编辑：六六作业网 时间：2024/12/24 09:13:18
一只x/3=y/4=z/5,求x+y+z/x及x+y+z/x-y+z的值一只x/3=y/4=z/5,求x+y+z/x及x+y+z/x-y+z的值一只x/3=y/4=z/5,求x+y+z/x及x+y+z
一只x/3=y/4=z/5,求x+y+z/x及x+y+z/x-y+z的值
一只x/3=y/4=z/5,求x+y+z/x及x+y+z/x-y+z的值
一只x/3=y/4=z/5,求x+y+z/x及x+y+z/x-y+z的值
令a=x/3=y/4=z/5
x=3a,y=4a,z=5a
所以x+y+z/x
=3a+4a+5a/3a
=12a/3a
=4
x+y+z/x-y+z
=3a+4a+5a/3a-4a+5a
=12a/4a
=3
用Y和Z表示X，代进去就好了
应该是把y和z用x表示出来
y=4x/3
z=5x/3
一只x/3=y/4=z/5,求x+y+z/x及x+y+z/x-y+z的值
1.已知x:y:z=4:5:7,求：（一）2x+3y+z/5z； （二）x+y/y+z 非常急,
x-y-2z=10 y-3z=-4 3x-y+5Z=21 三元一次方求大神x-y-2z=10y-3z=-43x-y+5Z=21
(x+y):(y+z):(z+x)=3:4:5 3x+y-z=-4已知(x+y):(y+z):(z+x)=3:4:5 ；3x+y-z=-4求x y z
x+y-z=3 y+z-x=5 z+x-y=7 求x,y,z
x+2y=3x+2z=4y+z 求x:y:z
设|x|-|y|+|z|=|x+y+z|,且|x+y|=4,|y+z|=5,|y|=3,求(x-y-z)^2的值
已知3X=4X,5Y=6Z求X+Y：Y+Z
x,y,z不是0.3z=4y,z=3x求（x+y）：（x+z）.
已知X+Y=3,Y+Z=4,Z+X=5,求Z,X,Y的值.
已知{x-5y+2z=0 3x-5y-4z=0,求x：y:z
已知2x+5y+4z=6 3x+y-7z=-4求x+y-z
2x+Y+3z=23,x+4y+5z=36,求X+2Y+3z~
若x/3=y/4=z/5,求x+y+z/3x-2y+z的值.
x/3=y/4=z/5,求x+y+z/3x-2y+z的值,
已知X:Y:Z=3:4:5,求4X+3Y-2Z/X+Y+Z的值
已知x/4=y/5=z/6 求x+y+z/3x-2y+z的值
若x:y:z=3:4:5=6,求x-y+z分之x+y-z的值