Math 141: PRACTICE TEST # 1: Chapter 1 KEY
(5, 21) Multiply 1st equation by 6 (the LCD) and the 2nd equation by 2 (the LCD) to get rid of the fractions. New system has the equations 9x - 2y = 3 and 4x – y = - 1. Multiply 4x – y = - 1 by – 2 and add to 9x – 2y = 3 to eliminate the y’s and get x = 5. ................
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