Question

6x-y-z=3 2x-4y+8z=5 3x-6y-z=10 这道题x y z 分别等于几？ 求各位神仙 大虾 帮个忙吧

6x-y-z=3 2x-4y+8z=5 3x-6y-z=10

Answer 1

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

追问

能给过程吗

追答

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

Answer 2

6x-y-z=3 6x-12y+24z=15 6x-12y-2z=20
26z=-5 z=-5/26
y=-437/26 x=-182/78

Answer 3

6x-12y+16z=10
6x-12y-2z=20
18z=-10
z=-9/5

Answer 4

x=-1322/3
y=263/286
z=-757305/286