Question

Can someone please help me through this?
Matrices question :o
~> use Gaussian elimination to find all solutions to the given system of equations. For these exercises, work with matrices :o at least until the back-substitution stage is reached
x + 2y + 4z = -3
-2x + y + 3z = 1
-3x + 4y + 10z = -1

Answer 1

it gives me a brain ache

Answer 2

=3x + 4y + 10z = 4

OR

-3x + 4y + 10z = 4 ???

Answer 3

whoops made a mistake

Answer 4

that makes more sense

Answer 5

:)