Which statement correctly explains how Mari should find a solution to the following system of linear equations using elimination?
2f-5g=-9
-7f+3g=4
Multiply the first equation by 7 and the second equation by 2, and then add.
Multiply the first equation by 3 and the second equation by 5, and then subtract.
Multiply the first equation by - 7 and the second equation by 2, and then add.
Multiply the first equation by - 3 and the second equation by 5, and then add.
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