Question

4r+6s-t =-18
3r+2s-4+=-24
-5r+3s+2t=15

Answer 1

You can use the row reduction echelon form method. Makes solving such problems easy.

Answer 2

Hint. I get r=-2 and s=-1. That should help you figure out what t equals.

Answer 3

use replacement if you are not familiar with matrices. so solve the first equation in terms of t and plug that into the second equation to find r and so forth

Answer 4

how would i set the problem up