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Thread: Simultaneous Equations!

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    Simultaneous Equations!

    A piggy bank contains 67 coins. If there are only one and two dollar coins in the piggy bank, and there are 25 more one dollar coins than two dollar coins, how many of each type are there?

    Thankyouuuuuu in advance !
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    Quote Originally Posted by geeorgiaaa View Post
    A piggy bank contains 67 coins. If there are only one and two dollar coins in the piggy bank, and there are 25 more one dollar coins than two dollar coins, how many of each type are there?

    Thankyouuuuuu in advance !
    Call the number of $1 coins x and the number of $2 coins y.


    You're told that there are 67 coins.

    So x + y = 67.


    You're also told that there are 25 more $1 coins than $2 coins.

    So x = y + 25.


    You can now substitute x from equation 2 into equation 1.
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