Question

Solve by using matrices. If no solution, write inconsistent. (Just trying to double check my work, don't need anyone to show their work)

{1 1 1 2
2 -1 -1 -5
1 2 2 5}

Answer 1

Assuming the matrix represents a system of linear equations:
\[x_{1}=x _{4}\]
\[x _{2}=-x _{3}-3x _{4}\]

Answer 2

Do you know what x, y, and z equal? It looks like z is arbitrary. And yes, it is system of linear equations.

Answer 3

wait, does this represent x+y+z=2, or x+y+z+2a=0?

Answer 4

x+y+z=2

Answer 5

oh, forget about my first anser then.

Answer 6

x=-1, y+z=3

Answer 7

Awesome! That's what I got too. Thanks