3a + c = 23 r + 2s - 2t = 5 4a + 7b - 2c = -22 4r + s + t = -1 8a - b - c = 34
Chapter 4, Problem 21(choose chapter or problem)
3a + c = 23 r + 2s - 2t = 5 4a + 7b - 2c = -22 4r + s + t = -1 8a - b - c = 34
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