Solve -2*i + 3*a - 6 = 0, 4*i + 2*a - 30 + 10 = 0 for i.
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What is the z'th term of 671, 1333, 1987, 2627, 3247, 3841?
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What is the y'th term of 3, -2, -17, -42?
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What is the u'th term of 758, 757, 754, 749, 742, 733, 722?
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What is the y'th term of 12, 77, 196, 369, 596, 877?
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What is the k'th term of 12, -5, -34, -81, -152?
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What is the t'th term of 8, 33, 96, 215, 408?
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