解方程组x/4=y/5=z/6 2x+3y-4y+3=0
解方程组:x+y+z=4,x+y+2z=5,3x+y-z=6
解方程组{3x+y-z=4,2x-y+3z=12,x+y+z=6}
已知方程组4x-5y+2z=0 x+2y=3z 则x:y:z
解三元一次方程组x:y=3:2,y:z=5:4,x+y+z=6
解方程组{6x=4y=3z,2x+y+z=22
解三元一次方程组:x+y+z=6,y-z=4,x-y-2z=3,
已知方程组4x-y+3z=0 2x+y+6z=0且xyz不等于0,则x/y+y/z+z/x是多少
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
解三元一次方程组:x+y-z=0 ① 3x+y=6 ① 2x-y+3z=2 ② x+2y-z=5 ② x-4y-2z+6
解方程组: (x+y)/3=(y+z)/4=(z+x)/5,3x-2y+6z+44=0
已知x,y,z满足方程组:4x-5y+2z=o;x+4y-3x=0,求x:y:z的值
解三元一次方程组{2x+y=10,x-y+z=4,3x-y-z=0