2x - 5 = 9 - x = 7, 4x - 7 = 9 - x = 4, 3(x - 2) = 9 - x = 5, 5x - 4 = 3x + 8 - x = 6, 2(x + 5) = 4x - 6 - x = 8, 7x + 3 = 4x + 12 - x = 3,

solving linear equations

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