6X+6Y=4Z+4X=3Y+Z X+Y+Z=27

来源：学生作业帮编辑：神马作文网作业帮分类：数学作业时间：2024/09/24 20:37:29

6x+6y=4z+4x
所以x+3y-2z=0 (1)
6x+6y=3y+z
6x+3y-z=0 (2)
x+y+z=27 (3)
(1)+(3)×2
3x+5y=54 (4)
(2)+(3)
7x+4y=27 (5)
(5)×5-(4)×4
35x-12x=135-216
23x=-181
x=-181/23
y=(54-3x)/5=357/23
z=27-x-y=445/23

已知3X=4X,5Y=6Z求X+Y：Y+Z 1.x+y=16,y+z=12,z+x=102.3x-y+z=4,2x+3y-z=12,x+y+z=63.x+y+z=6 2x+5y+4z=6,3x+y-7z=-4,x+y-z=? 解方程组x-y-3z=4 3x+y-z=6 -x+3y+z=8 {2x+3y-4z=-5 x+y+z=6 x-y+3z=10 解方程组{3x+y-z=4,2x-y+3z=12,x+y+z=6} 2x-y+2z=-17 3x+y-3z=-4 x+y+z=6 x+y+z=4 2x+3y-z=6 3x+2y+2z=10 解方程{3x -y+z=4 2x+3y-z=12 x+y+z=6 已知2x+5y+4z=6 3x+y-7z=-4求x+y-z 3x+7y+z=5 ,4x+10y+z=6 ,x+y+z= 已知3X+7Y+Z=6 4X+10Y+z=7 求X+Y+Z=?