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19 August, 22:29

B+c=7

a+b=5

a*b+b*c=18

a=?

b=?

c=?

P. S! I don't speak Englesh fluently because I'm Romanian and I use Google Translate.

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Answers (1)
  1. 19 August, 22:58
    0
    B+c = 7 = 3 + 4

    a+b = 5 = 2 + 3

    so a = 2, b=3, c = 4

    axb + b xc = (2x3) + (3x4) = 6 + 12 = 18
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