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21 January, 18:56

The sum of the product of a number and 9 and twice the number is 49

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Answers (1)
  1. 21 January, 19:21
    0
    Step-by-step explanation:

    I got

    44

    and

    5

    Explanation:

    Call the numbers

    x

    and

    y

    , you get:

    x

    +

    y

    =

    49

    x

    =

    8

    y

    +

    4

    substitute the second equation into the first:

    8

    y

    +

    4

    +

    y

    =

    49

    9

    y

    =

    45

    y

    =

    45

    9

    =

    5

    so that:

    x

    =

    8



    5

    +

    4

    =

    44
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