Solve -7*u - a - 5 = -4*u, 0 = -2*u - 4*a for u.
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What is the d'th term of -28, -65, -140, -271, -476, -773, -1180, -1715?
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What is the y'th term of 38, 27, 16, 5, -6, -17?
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What is the y'th term of -17, -36, -81, -164, -297?
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What is the m'th term of -1910, -3817, -5724, -7631, -9538?
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What is the v'th term of -86, -154, -268, -428, -634, -886?
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What is the v'th term of -3947, -7888, -11827, -15764, -19699, -23632?
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