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posted by vanessa on Sunday, October 13, 2013 at 9:09pm.

Use linear combinations to solve these systems. 5r-3s=12 3r+55=28

3r+55=28 3r = -27 r = -9 5r-3s=12 (5 * -9) - 3s = 12 -45 -3s = 12 -3x = 57 x = -19

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