Which statements are true about the ordered pair (−1,−4) and the system of equations?

x−y=3

7x−y=−3

Select all correct answers.

1. When ​ (−1,−4) ​ is substituted into the second equation, the equation is true.
   
2. When ​ (−1,−4) ​ is substituted into the first equation, the equation is true.
   
3. When ​ (−1,−4) ​ is substituted into the second equation, the equation is false.
   
4. The ordered pair ​ (−1,−4)​ is not a solution to the system of linear equations.
   
5. The ordered pair ​ (−1,−4) ​ is a solution to the system of linear equations.
   
6. When ​ (−1,−4)​ is substituted into the first equation, the equation is false.