解方程x+y+z=2,3x-y-4z=5 ,2x+3y-2z=0

来源：学生作业帮编辑：灵鹊做题网作业帮分类：数学作业时间：2024/06/14 04:09:54

解方程x+y+z=2,3x-y-4z=5 ,2x+3y-2z=0
要过程的.O(∩_∩)O谢谢!

x+y+z=2 (1)
3x-y-4z=5 (2)
2x+3y-2z=0 (3)
(1)+(2)得
4x-3z=7 (4)
(1)*3-(3)得
3x+3y+3z-2x-3y+2z=6-0
x+5z=6 (5）
(4)*5+(5)*3得
5(4x-3z)+3(x+5z)=7*5+6*3
23x=53
x=53/23
5z=6-x
z=17/23
y=2-x-z=-24/23
所以x=53/23 y=-24/23 z=17/23

解方程：{2x+3y+z=7,x+y+z=4,3x+y-z=-4 解方程{3x -y+z=4 2x+3y-z=12 x+y+z=6 已知x,y,z,同时满足方程x+3y-5z=0,2x-y-3z=0求x：y：z的值解方程一;{x+y-z=6,x-3y+2z=1,3x+2y-z=-7.②{3x+4z=7,2x+3y+z=9,5x-9y 试证明(x+y-2z)+(y+z-2x)+(z+x-2y)=3(x+y-2z)(y+z-2x)(z+x-2y) x/2=y/3=z/5 x+3y-z/x-3y+z 已知2x+3y+z=130,3x+5y+z=180,试求x+2y/z+y+z【在线等高手解方程】 3x-y+z=3 2x+y-3z=11 x+y+z=12 解方程解方程:x+2y+3z=8 x+3y+5z=6 解方程x+y+z=2,3x-y-4z=5 ,2x+3y-2z=0 2x+5y+4z=0,3x+y-7z=0,则x+y-z=? 解方程组：x+y+z=4,x+y+2z=5,3x+y-z=6