Question

Solve the system of equations. Write solution as (x,y,z). If the system is inconsistent, write "no solution".

x-2y-3z=5
2x+y-z=5
4x-3y-7z=5

(x,y,z) =

Answer 1

so first I would subtract trwice the first from the second correct?

Answer 2

yup

Answer 3

and then what would you do?

Answer 4

subtract twice the second from the third?

Answer 5

yup. thats good.

Answer 6

looks to be inconsistent because I end up with -5y-5z=-5 and 5y+5z=-5

Answer 7

which would mean 0=-10 which isn't true

Answer 8

that correct or did I miss something?

Answer 9

that is correct.

Answer 10

woohoo! thanks