3x+2y=4y+3z=5z+5x,请问x:y:z等于几比几比几?
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3x+2y=4y+3z=5z+5x,请问x:y:z等于几比几比几?3x+2y=4y+3z=5z+5x,请问x:y:z等于几比几比几?3x+2y=4y+3z=5z+5x,请问x:y:z等于几比几比几?由
3x+2y=4y+3z=5z+5x,请问x:y:z等于几比几比几?
3x+2y=4y+3z=5z+5x,请问x:y:z等于几比几比几?
3x+2y=4y+3z=5z+5x,请问x:y:z等于几比几比几?
由3x+2y=4y+3z得 X得 X=(2y+3Z)/3
由4y+3z=5z+5x得 X=(4y-2Z)/5 所以得 (2y+3Z)/3 =(4y-2Z)/5
则得Z=2y/21 所以X=(2y+3Z)/3 =16y/21
所以x:y:z=16y/21 :y:2y/21 =16:21:2
3x+2y=4y+3z,2y=3x-3z
4y+3z=5z+5x,6x-6z+3z=5z+5x,x=8z
2y=24z-3z=21z,y=21/2
x:y:z==16:21:2
16:21:2
16:21:2
(4x-2y-z)-{5x-[8y-2z-(x-2y)]-x-(3y-10z)}=?
x/2=y/3=z/5 x+3y-z/x-3y+z
设|x|-|y|+|z|=|x+y+z|,且|x+y|=4,|y+z|=5,|y|=3,求(x-y-z)^2的值
(4x-2y-z)-{5x-[8y-2z-(x+y)]-2(3y-10z)}=?好难啊
x+y=5 2x+3y-z=9 x-y+z=4
已知x-y/x+y=y+z/2(y-z)=z+x/3(z-x),求证8x+9y+5z=0THX..
(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
已知:4x-5y+2z=0 x+4y-3z=0则:(x*x+y*y+z*z)/(x*y+y*z+z*x)=____.
{ 5x-3y+z=25x+2y-4z=3-5x+y-z=2
已知(x+2y)/3=(y+3z)/4=(z+5x)/5,则x:y:z=
已知x+2y/3=y+3z/4=z+5x/5,则x:y:z=?
已知x+2y/3=y+3z/4=z+5x/5,则x:y:z=
x+y+z=4 2x-y+z=3 3x-2y-3z=-5
3x-2y+z=4 x+y-z=5 4x-4y+3z=27
x:y:z=3:4:5 2x-3y+2z=8 x-y-2z=?
x-y+z=-1 5x+2y-z=6 4x-3y+2z=-5
x+y+z=-5,3x+y+z=1,4x+3y+2z=-2快
若x/2=y/3=z/4,则3x-2y+5z/x+y+z=