Solve -2*r + 3*d - 15 + 5 = 0, -5*r = 5*d + 25 for r.
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What is the f'th term of -647, -1295, -1943?
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What is the t'th term of -722, -1450, -2174, -2894, -3610?
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What is the y'th term of -19, -47, -83, -127, -179, -239, -307?
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What is the m'th term of 3, -2, -11, -24, -41, -62, -87?
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What is the k'th term of -146, -250, -368, -506, -670, -866, -1100?
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What is the r'th term of 76, 74, 82, 106, 152, 226, 334?
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