已知方程组 5x+8y+z=0 -5x+6y+z=0求x:y:z=?
已知方程组3x+5y+3z=0,3x-5y-8z=0,并且z≠0,求x:z和y:z
已知x、y、z满足方程组:x+y-z=6;y+z-x=2;z+x-y=0 求x、y、z的值
已知x.y.z满足方程组x+2y-4z=0 2x+y-5z=0 求x:y:z的值
已知x,y,z满足方程组{x+y-z=6{y+z-x=2{z+x_y=0,求x,y,z的值
已知方程组 5x+8y+z=0 -5x+6y+z=0求x:y:z=?
已知x,y,z满足方程组{x+y-z=6,y+z-x=2,z+x-y=0,求x,
已知x,y,z满足方程组:4x-5y+2z=o;x+4y-3x=0,求x:y:z的值
已知方程组4x-5y+2z=0 x+2y=3z 则x:y:z
已知XYZ满足方程组 X+Y-Z=6 Y+Z-X=2 Z+X-y=0 求X Y Z的值
已知x+y-z/z=x-y+z/y=-x+y+z/x,且xyz不等于0,求分式[(x+y)(x+z)(y+z)]/xyz
已知:(x+y-z)/z=(x-y+z)/y+(y+z-x)/x,且xyz≠0,求代数式[(x+y)(y+z)(x+z)
已知方程组4x-3y-6z=0,x+2y-7z=0(z≠0),求x+y+3z/4x-y-5z的值