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(3x - 1) + 7 = (7x - 2x) + x

3x - 1 + 7 = 7x - 2x + x

3x + 6 = 6x

6 = 3x

x = 6/3 = 2

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Q: 3x-1 plus 7 equals 7x-2x plus x?
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