English, 29.06.2019 20:30 sherylpoche23

Given the system of linear equations. choose all of the options that could be used to solve the system using addition
{x+y=7
12x+y = 5
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.

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