Answer:
1) no, because a solution must be an ordered triple pair (x,y,z)
2) { x+y+z=5
{ 2x-3y+z=7
{ x+2y-4z=2
3) infinity many solutions
4) use equations (1) and (2) to eliminate y
5) solve one equation for one of its varaibles
Step-by-step explanation:
should be 100% on the quick check if you put those answers
