4X-5Y+2Z=1,8X-3Y-Z=15,5X+2Y-3Z=18

x+y+z=-1 4x-2y+3z=5 y-z=8-2x {x+y+z=1;x+3y+7z=-1;z+5y+8z=-2 解三元一次方程组1、x+y-z=4 2x-y+z=5 x-3y+z=-2 2、y+2z=-2 3x+y-4z=1 2x-y+2z=8 3、x-2y+z=-1 x+y+z=2x+2y+3z=-1 x+Y+Z=1 X+3Y+7Z=-1 X+5Y+8Z=2x+Y+Z=1X+3Y+7Z=-1X+5Y+8Z=2 {x+y+z=1 x-2y+3z=5 2x-3y-3z=-8 {x+y+z=1 {x+3y+7z=-1 {x+5y+8z=2 x-y+z=-1 5x+2y-z=6 4x-3y+2z=-5 2x+3y+z=8 4x-y-z=10 x+2y-z=1 x+y+z=-5,3x+y+z=1,4x+3y+2z=-2快 3x-y+2z=-1 4x+y+z=5 x-2y-z=-2 x+y+z=1 4x+5y-z=6 x+2y-z=3 {x+y+z=1 {x+3y+7z=2 {x+5y+19z=4 三元一次方程组题目x+y-z=11 y+z-x=5 x-y+z=1x+y=4 y+z=3 x+z=5若已知x-3y+2z=0 2x+3y-8z=0, 且xyz≠0,则x:y:z= 1.{x:y:z=3:4:5 2x+3y-5z=-142.{x-y-z=-1 3x+5y+7z=11 4x-y+2z=-13.{x+y=1 x+z=0 2x+y+2z=44.{x-y+z=-3 2x-y-z=-2 -3x+y+z=-15.{x-y+z=-3 3x+y-4z=6 2x+y-z=36.{x-2y+5z=16 2x+y-5z=7 2x-y+z=38 (4x-2y-z)-{5x-[8y-2z-(x-2y)]-x-(3y-10z)}=? x-y-z=-1 3x+5y+7z=11 4x-y+2z=-1 分别求出x=?y=?z=? 三元一次方程 X-y-z=-1 3x+5y+7z=11 4x-y+2z=-1 X=?Y=?Z=? 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.