已知:x-3y+z=0,3x-3y-4z=0,求(4x-12y+z分之2x+6y-11z)的平方
已知:x-3y+z=0,3x-3y-4z=0,求(4x-12y+z分之2x+6y-11z)的平方
已知x::y:z=3:4:5,(1)求x+y分之z的值;(2)若x+y+z=6,求x,y,z.
已知2x=3y=4z求2x-y+z分之x+y+z的值
已知x:y:z=2:3:4求x-y+z分之x+y-z的值
已知(x+2y-4)的平方+(2y+z)的平方+|x-4y+z|=0求3x+y-z
已知{3x+4y+5z=0,2x+3y-4z=0,求x+y+z/x-y+z的值.
已知2x+3y-4z=0,3x+4y+5z=0,求x+y+z/(除以)x-y+z的值.
已知2x+3y-4z=0,3x+4y+5z=0,求x+y+z/x-y+z的值.
已知x+4y+3z=3x-2y-5z=0,求x+2y-z/2x-3y+7z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-3y-6y=0,x+2y-7z=0.求x-y+z\x+y+z的值