Question

Tell whether the ordered pair (3, -1) is a solution of the given system.
{x-2y=5
2x-y=7
Answers: Yes, No

Answer 1

when (x=3 and y=-1) do we get true statements or false statements?

Answer 2

x-2y=5
3 -1
--------
3+2 =5 , yes or no?

2x-y=7
3 -1
-------
6+1 = 7 ; yes or no?

if both are yes, then its a solution to both; if one or none or no; then its a bad solution