x+2y+3z=6 4x+5y+6z=0 7x+8y+9z=-6求解
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x+2y+3z=6 4x+5y+6z=0 7x+8y+9z=-6求解
x+2y+3z=6 4x+5y+6z=0 7x+8y+9z=-6求解
x+2y+3z=6 4x+5y+6z=0 7x+8y+9z=-6求解
x+2y+z=6(1)
4x+5y+6z=0(2)
7x+8y+9z=-6(3)
(1)*4-(2):3y-2z=24(3)
(1)*7-(3)::6y-2z=48(4)
(4)-(3),3y=24
y=8(5)
把(5)式代入(3)式得:3*8-2z=24
z=0(6)
把(5)式和(6)式代入(1)式得:x+2*8+0=6
x=-10
所以:x=-10,y=8,z=0
x=-6
y=0
z=4
x+2y+3z=6
4x+5y+6z=0 , 3y+6z=24,
x=-8, y=4, z=2
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
已知4x-3y-6z=0,x+2y-7z=0,求5x+2y-z/2x-3y-10z
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
三元一次方程组 x+y+z=6 x-z=2 2x-y+z=5 三元一次方程组x+y-z=-3 2x+y-3z=-2 3x-y+2z=-11三元一次方程组5z-4y=0 3y-5z=0 2x-y+z=6
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
X+y-z=6;x-3y+2z=0;3x+2y-z=4
x-y+z=-1 5x+2y-z=6 4x-3y+2z=-5
{x+y+z=0 4x+2y+z=3 9x+3y+z=6
{x+y+z=0 {4x+2y+z=3 {9x+2y+z=6
2x+5y+4z=6,3x+y-7z=-4,x+y-z=?
{2x+3y-4z=-5 x+y+z=6 x-y+3z=10
解方程组x+y+z=6 x+2y-3z=4 2x-y+z=5
x+y+z=1 4x+5y-z=6 x+2y-z=3
解方程组:x+y+z=4,x+y+2z=5,3x+y-z=6
已知2x+5y+4z=6 3x+y-7z=-4求x+y-z
已知x/4=y/5=z/6 求x+y+z/3x-2y+z的值
已知x/4=y/5=z/6,求x+y+z/3x-2y+z的值.
5x+3y+2z=2011 4x+6y+7z=2012 求x+y+z