金缕衣txt百度云资源:(2y+z)/x=(2x+y)/z=(2z+x)/y=k,则k=( )
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3
3或0
16. 设x+y+z=3y=2z , 求x/(x+y+z)的值5.7
已知3x-z=x+y+z=4x+2y-z,求x : y : z
如果x/2=y/7=z/5,x,y,z都不等于0,则(x+y+z)/(3x-y)等于多少?
x =2y,3y=4z,则x:y:z =?:?:?
以知自然数x,y,z.满足x^2+xy-z=0,且y,z为质数,求x^y+y^z+z^x的值.
若x,y,z为实数,且(y-z)^2+(z-x)^2+(x-y)^2=(y+z-2x)^2+(z+x-2y)^2+(x+y-2z)^2
已知数x、y、z满足x/y+z + y/z+x +z/x+y=1,求
X+Y+Z=6 X-3Y+2Z=1 3X+2Y-Z=4
对(x+y+z)^2+(x-y)^2/(y-z)^2/(z-x)^2求解
2x+Y+3z=23,x+4y+5z=36,求X+2Y+3z~~~~