Ok here I am working on this problem for like 3 hours to no avail.
x1 + x2 = 1
-x1 + x2 + x3 = -1
-1x2 + x3 = 3
I am trying to solve this in matrix form and get the point of multiplaying a cooefficiant but applying it to this set is baffling my mind. Any insights?
is the matrix
1 1 0
-1 1 0
0 -1 1