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26 October, 11:29

The sum of two numers is 52. The difference of the two numbers is 38. What are the two numbers? Write the two numbers separated by a comma.

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  1. 26 October, 14:33
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    Let the first number be 'x' and the second number is 'y'

    Equation 1: x + y = 52

    Equation 2: x - y = 38

    Rearranging equation 2 to make either x or y the subject

    x = 38 + y

    Substituting x = 38 + y into equation 1

    x + y = 52

    (38+y) + y = 52

    38 + 2y = 52

    2y = 52 - 38

    2y = 14

    y = 7

    Substitute y = 7 into either equation 1 or equation 2 to find x

    x + y = 52

    x + 7 = 52

    x = 52 - 7

    x = 45

    x = 45

    y = 7
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