You have $140 in a savings account and save $10 per week. Your friend has $95 in a savings account a

Discussion in 'Calculator Requests' started by math_celebrity, Oct 24, 2020.

  1. math_celebrity

    math_celebrity Administrator Staff Member

    You have $140 in a savings account and save $10 per week. Your friend has $95 in a savings account and saves $19 per week. How many weeks will it take for you and your friend to have the same balance?

    Set up the savings account S(w) for you where w is the number of weeks
    S(w) = 140 + 10w

    Set up the savings account S(w) for your friend where w is the number of weeks
    S(w) = 95 + 19w

    The problem asks for the number of weeks (w) when the balances are the same. So set both equations equal to each other:
    140 + 10w = 95 + 19w

    To solve this equation for w, we type it in the search engine and get:
    w = 5
     

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