若3x-2y-z=0,x+4y-3z=0,求3x²+y²/4x²-y²+z
若3x-2y-z=0,x+4y-3z=0,求3x²+y²/4x²-y²+z
已知实数x,y,z满足x²-6xy+10y²+4y+|z²-3z+2|+4=0,求(x+y
初一 下 数学 1、已知3x-4y-z=0,2x+y-8z=0,求 x²+y²-z²÷xy
若x/2=y/3=z/4不等于0,求x+y+z/x+y-z的值
若|x-2|+|3x-6y|+(3y+z)²=0,求x+y+z的值
已知x²+y²+z²-2x+4y-6z+14=0,求x+y-z/x+y+z的值
已知4x-3y-3z=0,x-3y-z=0 求xy+2yz/x²+y²+z²
已知4x-5y+2z=0,x+4y-3z=0,求(x²+y²+z²)/xy+yz+xz
已知3x-4y-z=0 2x+y-8z =0,求(x²+y²-z²)/(xy+yz)的值
已知有理数x、y、z满足关系式(x-4)²+四分之一丨x+y-z丨=0,求5x+3y-3z的值
若4x-3y-6z=0,x+2y-7z=0,求代数式5x*5x+2y*2y-z*z/2x*2x-3y*3y-10z*10
已知3x-2y-5z=0,2x-5y+4z=0,且x,y,z均不为0,求3x*x+2y*y+5z*z/5x*x+y*y-