Question

x+y-z=6 x-3y+2z=1 3x+2y-z=4要过程谢谢

Answer 1

x+y-z=6 .(1)

x-3y+2z=1 .(2)

3x+2y-z=4.(3)

(1)+(2)+(3)得

5x=11

x=2.2

代入(1)(2)得

y-z=3.8.(4)

-3y+2z=-1.2.(5)

(4)*2+(5)得

-y=6.4

y=-6.4

代入(4)得

-6.4-z=3.8

z=-10.2

解得

x=2.2

y=-6.4

z=-10.2