two friends have a conversation mario tells roberto “the money i have is twice that you have” roberto answer “if you give me 6 dollars will

Question

two friends have a conversation mario tells roberto “the money i have is twice that you have” roberto answer “if you give me 6 dollars will we both have the same amount” how much money have each of them?​

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RuslanHeatt 3 years 2021-09-05T13:56:48+00:00 1 Answers 6 views 0

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  1. thanhcong
    0
    2021-09-05T13:58:23+00:00
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    Answer:

    Before anyone gives anyone money, Mario has 24 dollars and Roberto has 12 dollars. After they give each other money, both of them have 18 dollars.

    Step-by-step explanation:

    Mario has twice as much as Roberto, BUT if Mario gives Roberto 6 dollars, then they have the same amount.

    M = 2R

    M – 6 = R + 6

    To isolate M, you need to add 6 on both sides.

    M – 6 + 6 = R + 6 + 6

    M = R + 12

    M = 2R

    Substitute M for the value above that we found.

    R + 12 = 2R

    Now we subtract R on both sides, so that only one side has the variable R.

    R – R + 12 = 2R – R

    12 = R

    M = 2R

    Substitute for the value of R.

    M = 2 x 12

    M = 24

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