Solve 6 = -2*f + 2*v, 12*f + 5*v = 7*f - 15 for f.
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What is the o'th term of 85, 74, 51, 10, -55, -150, -281?
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What is the h'th term of 20, 28, 38, 50, 64, 80, 98?
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What is the g'th term of -10, -98, -244, -448, -710, -1030, -1408?
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What is the f'th term of 1840, 1841, 1840, 1837, 1832, 1825, 1816?
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What is the l'th term of -85, -172, -259, -346, -433?
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What is the y'th term of -9, -34, -83, -168, -301, -494?
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