Which statement correctly explains how Mari could find the solution to the following system of linear equations using elimination? Group of answer choices 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 –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.