6x+3y-2z=108,9x+7y-3z=212,3x-2y+5z=38,求x,y,z

6x+3y-2z=108,9x+7y-3z=212,3x-2y+5z=38,求x,y,z 三元一次方程解 1.{x+y-z=5 {3x+2y+z=2 {2x-2y+z=-31.{x+y-z=5 2.{9x-5y+x=-6 3.{x-y=3 4.{x+y=3 5.{4x-2y+z=7{3x+2y+z=2 {9x+y-2z=3 {x+z=7 {y+z=4 {2x-y-3z=28{2x-2y+z=-3 {-9x+3y-5z=0 {y-z=6 {z+x=5 {x+y-2z=13 ..1.x+y+z=26,2.4y+3z=7,y-z=1,3x+2z=17,x+2y-z=18 9x-7y=173.x-7y+3z=17 4.2x+4y+3z=95x-6y-z=24 3x-2y+5z=113x+7y-2z=1 5x-6y+7z=131.x+y+z=26,y-z=1x+2y-z=18 2.4y+3z=7,3x+2z=11,9x-7y=17 3.x-7y+3z=17 5x-6y-z=24 3x+7y-2z=14.2x+4y+3z=93x-2y+5z=11 5x-6y+7z=13 4x+9y=12 3y-2y+5z=11 5x-6y+7z=13 求：x y z等于多少 若X:Y:Z=5:6:7那么(Y-X):(Y+Z)和(X+2Y+3Z):(3X+2Y+Z) 三元一次方程x+y+z=0 4x+2y+z=3 9x+3y+z=6x+y+z=04x+2y+z=3 9x+3y+z=6 (1)X+Y=15,Y+Z=-6,Z+X=7.(2)X+Y=-14,Y+Z=-7,Z+X=9.(3)X+Y=0,Y+Z=-1,Z+X=-1. 已知x-y/x+y=y+z/2(y-z)=z+x/3(z-x),求证8x+9y+5z=0THX.. 方程组3x+y+2z=10,2x+3y-z=9,x+y+z=6 2x-3y-z=-6 7x-y+2z=-17 x-y+z=-6 x=2y-9z x+2y-3z=2 x-2y+6z=1 {x+y+z=0 4x+2y+z=3 9x+3y+z=6 {x+y+z=6,2x-y+z=3,3x+9y+z=24 {x+y+z=0 {4x+2y+z=3 {9x+2y+z=6 方程组3x-y-z=9,2x+y-2z=6,x+y+z=15 x+y+z+2,4x+2y+z+2,9x+3y+z=6解方程组 2x+5y+4z=6,3x+y-7z=-4,x+y-z=? 已知2x+5y+4z=6 3x+y-7z=-4求x+y-z