Question

Solve the system.

Answer 1

okay?so where are you stuck

Answer 2

1 3 1
-2 1 -23

1 3 1
0 7 -21

1 3 1
0 1 -3

So now use back substiution

x+3y=1

and

y=-3

now plug in value of y and get x.

Answer 3

The method used is Gaussian elimination.

Answer 4

^ seems like they just want answer,

Answer 5

Well if a similar question is asked the next time,they'll be doing it on their own.