6x+4y-2z=4 2x+4y+5z=6 x+y+z=1解方程
解方程一;{x+y-z=6,x-3y+2z=1,3x+2y-z=-7.②{3x+4z=7,2x+3y+z=9,5x-9y
解方程{3x -y+z=4 2x+3y-z=12 x+y+z=6
解方程组:x+y+z=4,x+y+2z=5,3x+y-z=6
已知x::y:z=3:4:5,(1)求x+y分之z的值;(2)若x+y+z=6,求x,y,z.
3元1次方程x-2y=-9 3x-y+z=4{ y-z=3 { 2x+3y-z=122z+x=47 x+y+z=6
解方程:{2x+3y+z=7,x+y+z=4,3x+y-z=-4
3x-5y-6z=4,2x-2y-3z=5 2x-3y-4z=4 解方程,
2x+4y+3z=9 3x-2y+5z=11 5x-6y+7z=13 这个方程怎么解?
2x+5y+4z=6,3x+y-7z=-4,x+y-z=?
解方程组{3x+y-z=4,2x-y+3z=12,x+y+z=6}
已知2x+5y+4z=6 3x+y-7z=-4求x+y-z
{2x+3y-4z=-5 x+y+z=6 x-y+3z=10