Given the system of linear equations. Choose all of the options that could be used to solve the system using addition

Question

{x+y=7
{2x+y=5

Multiply the first equation by 2 and the second equation by -1, then add the equations together.
Multiply the first equation by -1 and add the equations together.
Multiply the second equation by -1 and the first equation by -1, then add the equations together.
Multiply the first equation by -2 and add the equations together.
Multiply the second equation by -1 and add the equations together.

Answer 1

All of the options except for "Multiply the second equation by -1 and add the equations together" could be used to solve the system using addition.