Edmund has $190 All $2 and $5 There are 4 more $2 than $5 How many $2 Edmund have?

Question

Edmund has $190 All $2 and $5 There are 4 more $2 than $5 How many $2 Edmund have?

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Everleigh 2 months 2021-07-28T00:43:28+00:00 1 Answers 0 views 0

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    2021-07-28T00:44:53+00:00

    Answer:

    Firstly 190$ is even so the number of 5$ is even and the number of 2$ is a multiple of 5.

    So 5k lots of 2$

    2n lots of 5$

    But if there are 4 less 5$ notes than 2$ notes

    5k – 4 = 2n

    Where 5k + 2n = 190$

    Or k * 10$ + n * 10$ = 190$

    Then k+n = 19

    Write n = 19 – k

    5k – 4 = 38 – 2k

    7k = 42

    k = 6

    n = 13

    So we have 130$ Of 5$ notes and 60$ of 2$ notew

    that’s 26 5$ notes and 30 2$ notes.

    Sonny x

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