{5x+2y-4z=1① 3x-3y+2z=1② -2x+3y-2z=0③}①在最上面 ②在中间 ③在最下面 就像这样:①{ ② }thank you
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![{5x+2y-4z=1① 3x-3y+2z=1② -2x+3y-2z=0③}①在最上面 ②在中间 ③在最下面 就像这样:①{ ② }thank you](/uploads/image/z/978279-15-9.jpg?t=%7B5x%2B2y-4z%3D1%E2%91%A0+3x-3y%2B2z%3D1%E2%91%A1+-2x%2B3y-2z%3D0%E2%91%A2%7D%E2%91%A0%E5%9C%A8%E6%9C%80%E4%B8%8A%E9%9D%A2+%E2%91%A1%E5%9C%A8%E4%B8%AD%E9%97%B4+%E2%91%A2%E5%9C%A8%E6%9C%80%E4%B8%8B%E9%9D%A2+%E5%B0%B1%E5%83%8F%E8%BF%99%E6%A0%B7%EF%BC%9A%E2%91%A0%7B+%E2%91%A1+%7Dthank+you)
{5x+2y-4z=1① 3x-3y+2z=1② -2x+3y-2z=0③}①在最上面 ②在中间 ③在最下面 就像这样:①{ ② }thank you
{5x+2y-4z=1① 3x-3y+2z=1② -2x+3y-2z=0③}
①在最上面 ②在中间 ③在最下面 就像这样:①
{ ② }
thank you
{5x+2y-4z=1① 3x-3y+2z=1② -2x+3y-2z=0③}①在最上面 ②在中间 ③在最下面 就像这样:①{ ② }thank you
X=1 Y=2 Z=2
5x+2y-4z=1
3x-3y+2z=1
-2x+3y-2z= 0
3+2式,消去y、z
x=1
将x=1,带入到1式、2式,得到
4、 2y-4z=-4
5、 -3y+2z=-4
5式x2
6 、 -6y+4z=-8
4式+6式
-6y=-12
y=2
将y=2 带入4式
得到z=2
即x=1、y=2、z=2
(4x-2y-z)-{5x-[8y-2z-(x-2y)]-x-(3y-10z)}=?
x+y+z=-5,3x+y+z=1,4x+3y+2z=-2快
x-y+z=-1 5x+2y-z=6 4x-3y+2z=-5
3x-y+2z=-1 4x+y+z=5 x-2y-z=-2
x+y+z=-1 4x-2y+3z=5 y-z=8-2x
x+y+z=1 4x+5y-z=6 x+2y-z=3
{x+y+z=1 {x+3y+7z=2 {x+5y+19z=4
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
{5x-3y+z=2{5x+2y-4z=3{-5x+y-z=2 {x-y-z=-1{3x+5y+7z{4x-y+2x=-1
解三元一次方程组 ①2x-y+z=1 3x+y -2z=2 X+2y-z=3 ②x-4y+z=-3 2x+Y-Z=18 X-Y-Z=7 ③4x+4y+2z=7 6X-4y-z=6 2x-y+z=1
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.
(4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuaihuajian
设|x|-|y|+|z|=|x+y+z|,且|x+y|=4,|y+z|=5,|y|=3,求(x-y-z)^2的值
x+2y-z=-5 x+y+2z=-1 3x+4y-2z=-12x+2y-z=3 2x+y+3z=0 4x+z=-4
x+y=5 2x+3y-z=9 x-y+z=4
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