x + 14 = 31, x = 17, 3x − 8 = 16, x = 8, 5x + 4 = 2x + 19, x = 5, 7x − 3 + 2x = 4x + 12, x = 3, −2x + 9 = 25, x = −8, 4/x + 5 = 12, x = 4/7, 3(2x + 1) = 2(x + 7), x = 2.75

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