已知方程组4x-3y-6z=0,x+2y-7z=0(z≠0),求x+y+3z/4x-y-5z的值
已知方程组4x-3y-6z=0,x+2y-7z=0(z≠0),求x+y+3z/4x-y-5z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x,y,z满足方程组:4x-5y+2z=o;x+4y-3x=0,求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x+4y+3z=3x-2y-5z=0,求x+2y-z/2x-3y+7z的值
方程组{4x-3y-3z=0,x-3y+z=0,(x.y.z不等于0),求x/z和y/z的值?
已知4x-3y-6z=0,x+2y-7z=0,且x,y,z≠0,求2x+3y+6z/x+5y+5z的值.
4x-3y-6z=0,x+2y-7z=0是一个方程组,那么x-y+z/x+y+z的值等于
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2x-3y-4z=0和x+y+z=0,并且z≠0,求x:y与y:z
已知{3x+4y+5z=0,2x+3y-4z=0,求x+y+z/x-y+z的值.