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3 May, 20:02

If p is prime and n is even such as that p+n = 47 and p*n=210 what is the value of n?

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  1. 3 May, 22:14
    0
    P+n=47

    pn=210

    p=47-n

    n (47-n) = 210

    47n-n^2-210=0

    n^2 - 47n + 210 = 0

    (n-5) (n-42) = 0

    n = 5 or 42. Since we are given n is even we take n = 42

    then p = 5
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