Solve 0 = -9*w + 12*w, 0 = 4*a + w - 20 for a.
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What is the v'th term of -5, -52, -129, -236, -373, -540?
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What is the c'th term of 1471, 1454, 1437, 1420, 1403, 1386?
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What is the n'th term of 456, 459, 464, 471, 480, 491, 504?
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What is the r'th term of -1670, -3341, -5014, -6689, -8366?
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What is the d'th term of -23, -92, -205, -362, -563?
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What is the h'th term of 2, 82, 208, 374, 574, 802, 1052?
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