Solve -d + 7*d - 5 = -5*r, -5*r + 5*d + 5 = 0 for r.
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What is the c'th term of 947, 960, 973?
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What is the j'th term of -2, -1, 8, 31, 74, 143?
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What is the i'th term of 58, 237, 536, 955?
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What is the m'th term of 182, 322, 474, 644, 838, 1062, 1322, 1624?
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What is the a'th term of 7, 74, 261, 628, 1235, 2142, 3409, 5096?
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What is the q'th term of -92, -184, -262, -320, -352, -352, -314, -232?
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