作业帮x+2y+3z=10,x-y+4z=10,x+3y+2z=2
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x+2y+3z=10,x-y+4z=10,x+3y+2z=2
x+2y+3z=10,x-y+4z=10,x+3y+2z=2
x+2y+3z=10,x-y+4z=10,x+3y+2z=2
x+2y+3z=10 (1)
x-y+4z=10 (2)
x+3y+2z=2 (3)
由(1)-(2)得
3y-z=0 (4)
由(3)-(2)得
4y-2z=-8 (5)
由(4)*2-(5)得
2y=8
y=4
z=12
x=-34
2x+z=10 x+y-z=4 3x-y-z=0
(4x-2y-z)-{5x-[8y-2z-(x-2y)]-x-(3y-10z)}=?
(4x-2y-z)-{5x-[8y-2z-(x+y)]-2(3y-10z)}=?好难啊
{2x+y=10 {x-y+z=4 {3x-y-z=0
X/10=Y/8=Z/9,则X+Y+Z/2Y-3Z
X=3z X+y+z=12 X+2y-2z=10
x+2y+3z=10,x-y+4z=10,x+3y+2z=2
x+2y+3z=10,x-y+4z=10,x+3y+2z=2
4x+y+z=-3 2x+3y-4z=-10 x+2y-z=-1
x-y+4z=10,x+3y+2z=2,x+2y+3z=11.
x+y+z=4 2x+3y-z=6 3x+2y+2z=10
x+2y+3z=10,4x+3y+2z=15则x+y+z=
x+2y+3Z=10,4x+3y+2z=15,求x+y+z=
3x+2y+z=4 x+y+z=10 2x+3y-z=1
x+y+2z=5 2x-y-z=4 3x+y-3z=10
2x+y+3z=10,3x+4y+2z=15,则x+y+z=
{2x+3y-4z=-5 x+y+z=6 x-y+3z=10
-2X+3Y+Z=-4-X-5Y-2Z=-13X+Y-Z=10