Question

Solve the system to find the pivots when 2u-v=0, -u+2v-w=0, -v+2w-z=0, -w+2z=5. You may carry the right hand side as a fifth column

Answer 1

It's a system with the same number of variables as equations, so it can be soved
I like putting this many variables in matrix format:now just pick a method: elimination, Cramer's rule, etc.