x/2=y/3=z/4 x+y+z=18 求方程组解
x/2=y/3=z/4 x+y+z=18 求方程组解
解方程组x-4y+z=-3,2x+y-z=18,x-y-z=7.
解方程组2x+y-3z=1,x-2y+z=6,3x-y+2z=9求x,y,z的值
解方程组{3x+y-z=4,2x-y+3z=12,x+y+z=6}
x+y/2=z+x/3+y=z/4,...x+y+z=27.解方程组.
解方程组:x+y+z=4,x+y+2z=5,3x+y-z=6
方程组:x-2y+4z=0,2x+3y-3z=0...xyz不等于0,求(2x+y-z)\(2x-y+z)
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?
已知方程组2x-3y-4z=0和x+y+z=0,并且z≠0,求x:y与y:z
方程组,2x+3y-4z=-2 3x-2y+5z=26 2x+5z=31,求方程组的解
解三元一次方程组:x+y+z=6,y-z=4,x-y-2z=3,
解方程组{x(x+y+z)=6,y(x+y+z)=12,z(x+y+z)=18