6x-y-z=3 2x-4y+8z=5 3x-6y-z=10 y z 分别等于几?大虾

来源：学生作业帮编辑：作业帮分类：数学作业时间：2024/05/22 13:58:40

6x-y-z=3
2x-4y+8z=5
3x-6y-z=10
联立方程得
x=61/286
y=437/286
z=-55/286
再问：能给过程吗
再答：过程是 6x-y-z=3 乘以8加上2x-4y+8z=5 得50x-12y=29 6x-y-z=3减3x-6y-z=10 得3x+5y=-7 联立50x-12y=29和3x+5y=-7 解得x=61/286 y=437/286 带入方程6x-y-z=3 得z=-55/286

{2x+3y-4z=-5 x+y+z=6 x-y+3z=10 2X+Y+Z=10,X+2Y+Z=-6,X+Y+2Z=8 5X+4Y-3Y=13,2X-3Y+7Z=19,3X-Y=2X 4x-3y-6z=0,x+2y-7z=0是一个方程组,那么x-y+z/x+y+z的值等于若4x-3y-6z=0,x+2y-7z=0,求代数式5x*5x+2y*2y-z*z/2x*2x-3y*3y-10z*10 x+y+z=4 2x+3y-z=6 3x+2y+2z=10 3x+7y+z=5 ,4x+10y+z=6 ,x+y+z= 2x+5y+4z=6,3x+y-7z=-4,x+y-z=? 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 5x+3y+2z=2011 4x+6y+7z=2012 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.