3/7 = 0.428571428571428
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To find the prime factors, start with the obvious ones. 4914 is even so divide it by 2 and we get 2457. The digit sum of this is 9, so divide by 9 (3x3) and get 273. The digit sum divides by 3 so divide by 3 and get 91, which is 13x7. So in total we have 2, 3, 3, 3, 7 and 13 as the prime factors of 4914
Divide by 3, 7 and 13. 1, 3, 7, 13, 21, 39, 91, 273
7 + 9 + 11 = 27. Divide by 3. = 9.
(51/3) / (13/4) = (16/3) / (7/4) = (16/3) * (4/7) = 64/21
32 = 3n - 7(add 7 to both sides)39 = 3n(divide both sides by 3)13 = n or n = 13