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27 September, 04:05

The sum of two numbers is 57 and the difference is 13 what are the numbers

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Answers (2)
  1. 27 September, 04:17
    0
    Guess and Check!

    N1=Number 1

    N2=Number 2

    n1 + n2 = 57

    n1 - n2 = 13

    2n2 = 70

    n2 = 35

    n1 = 57 - 35 = 22

    22 and 35=number
  2. 27 September, 04:32
    0
    Let the numbers be x and y

    x + y = 57 ... (i)

    x - y = 13 ... (ii)

    Add equations (i) and (ii) to eliminate y

    x + y + x - y = 57 + 13

    x + x + y - y = 57 + 13

    2x = 70

    x = 70/2 = 35

    From (i) x + y = 57

    35 + y = 57

    y = 57 - 35

    y = 22

    The numbers are 35 and 22.
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