x-y+z=6 x+y-z=0 2x-3y+8z=33
4x-3y-6z=0,x+2y-7z=0,xyz的积不等于0,求(x+y-z)/(x-y+2z)的值
x-y-z=0 {x+y-3z=4 2x-5y+7z=21 三元一次方程解
已知方程组{2x-y+z=3,3x+4y-z=8,x+y-2z=-3,
已知xyz≠0,且x+3y+z=0,2x+3y-z=0 ,求x+2y-7z /3x+5y+z的值?
解方程组:2x-y+z=6.-3x+2y-z=-9.x+y-2z=-1求解
已知x/2=y/3=z/5,且3x+4z-2y=40,求x、y、z的值﹔详解
已知xyz都不为零,且方程组4x-3y-3z=0,x-3y+z=0求x:y:z
已知方程组{2x-y+z=3,3x+4y-z=8,x+y-2z=-3若消去z得到二元一次方程组(),若消去y,得到二元
若x,y,z满足方程租3x+7y-z=3 4x+10y-z=2 求x+y-z
已知4x-5z=y-x+6z=x+y+z,xyz不等于0,求x:y:z
已知xyz满足条件(x-2y-4)的平方+(2y+z)的平方+丨x-4y+z丨=0,求3x+y-Z
1.{x+2y=4,2x+5y-2z=11,3x-5y+2z=-1