x:y:z=4:7:8 x+y+2z=54
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x:y:z=4:7:8x+y+2z=54x:y:z=4:7:8x+y+2z=54x:y:z=4:7:8x+y+2z=54这是啥东西?求x、y、z?y=7/4xz=2x代入方程x+7/4x+2*2x=5
x:y:z=4:7:8 x+y+2z=54
x:y:z=4:7:8 x+y+2z=54
x:y:z=4:7:8 x+y+2z=54
这是啥东西?求x、y、z?
y=7/4x z=2x
代入方程 x+7/4x+2*2x=54
x=8
那么y=14 z=16
已知关于x y z的方程组2x-3y+5z=7 x+2y-3z=8,则4x+y-z=
(4x-2y-z)-{5x-[8y-2z-(x-2y)]-x-(3y-10z)}=?
三元一次方程组2x+z=3 3x+y-z=8 x+3y+2z=3 5x+2y-3z=2 x+2y+z=6 7x-2y-4z=262x+z=3 3x+y-z=8 x+3y+2z=3 5x+2y-3z=2 x+2y+z=6 7x-2y-4z=26
{x+y+z=1;x+3y+7z=-1;z+5y+8z=-2
(x*x+2)(y*y+4)(z*z+8)=64xyz,求x,y,z
(4x-2y-z)-{5x-[8y-2z-(x+y)]-2(3y-10z)}=?好难啊
已知x-y/x+y=y+z/2(y-z)=z+x/3(z-x),求证8x+9y+5z=0THX..
x+Y+Z=1 X+3Y+7Z=-1 X+5Y+8Z=2x+Y+Z=1X+3Y+7Z=-1X+5Y+8Z=2
{x+y+z=1 {x+3y+7z=-1 {x+5y+8z=2
2x+5y+4z=6,3x+y-7z=-4,x+y-z=?
x:y:z=3:4:5 2x-3y+2z=8 x-y-2z=?
x+y+z=-1 4x-2y+3z=5 y-z=8-2x
X-Y-Z=0 X+Y-3Z=4 2X-5Y+7Z=21
3x+7y+4z=35,x+5y+2z=40,x+y+z=( )
{x+y+z=1 {x+3y+7z=2 {x+5y+19z=4
已知2x+5y+4z=6 3x+y-7z=-4求x+y-z
x+y+z=51 4x+8y+5z=300 x+y+2z=67
若4x=7y+5z,2x+y=z,则x:y:z的值为