对满足(x+y)/2=(y+z)/3=(z+x)/7的任意实数x,y,z
对满足(x+y)/2=(y+z)/3=(z+x)/7的任意实数x,y,z
已知实数x,y,z满足关系式2x-3y-z=0,x-2y+z=0,求x比y比z的值
已知x,y,z为实数,满足x+2y-z=6x-y+2z=3
已知x,y,z均为实数,且满足:x+2y-z=6,x-y+2z=3.求x+y+z的最小值
已知实数 x y z 满足x+y-z=0 ,3x-y+2z=0 则x :y :z
实数x、y、z满足x=6-3yx+3y-2xy+2z
已知实数xyz满足x/y+z+y/z+x+z/x+y=1求x^2/y+z+y^2/z+x+z^2/x+y的值
已知实数x,y,z满足x/(y+z)+y/(z+x)+z/(x+y)=1,求x2/(y+z)+y2/(z+x)+z2/(
已知有理数x,y,z满足|x-z-2|+|3x-6y-7|+(3y+3z-40)^2=0,求x,y,z的值
已知实数x.y.z满足x+y=5及z的2次方=xy+y-9则x+2y+3z=?
已知实数x,y,z,满足x+y=5,z²=xy+y=9,求x+2y+3Z的值
已知实数x,y,z满足x-y=5,z^2=-xy-y-9,求x-2y+3z的值