已知{2x+5y+3x=0,2x-5y-8x=0}求x不等于0,求x:y:z的值
已知{2x+5y+3x=0,2x-5y-8x=0}求x不等于0,求x:y:z的值
已知4x-3y+z=0,x+2y-8z=0,xyz不等于0,求x+y-z/x-y+2z的值
已知XYZ不等于0,且2X+3Y=3X-8Y=5Z,求X+Y\X-Y的值
已知x/1=y/3=z/5(x不等于0),求(x+3y-z)/(x-3y+2z)的值.
已知x/2=y/3=z/4,且x+y+z不等于0,求2x+3y-4z/x+y+z的值
已知{4x-5y 2z=0/x 4y-3x=0(xyz不等于0),求x:y:z:d的值
已知x-4y=0,z=5x(x不等于0),求代数式x-14y+3z/x+y+z的值
已知x=3y,z=7x(x不等于0),求代数式2x+3y-z分之x+y+z的值
已知xyz不等于0,且x+2y-z=0,7x-y-z=0,求x+y+z/2x-y-z的值.
若x/2=y/3=z/4不等于0,求x+y+z/x+y-z的值
已知5分之X+Y=6分之Y+Z=7分之x+z,且X,Y,Z都不等于0,求X:Y:Z的值
已知x+y-7z=0 x-2y+5z=0(xyz不等于0),求x+2y-z/y-2x+12z