Mathematics, 05.11.2019 11:31, russboys3

Given the system of linear equations.
\left \{ {{x+y=7} \atop {2x+y=5}} \right.
choose all of the options that could be used to solve the system using addition

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

$Given the system of linear equations. \left \{ {{x+y=7} \atop {2x+y=5}} \right. choose$

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Given the system of linear equations.
\left \{ {{x+y=7} \atop {2x+y=5}} \right.
choose...