algebra

Mac's wallett is full of $5 and $10 bills. He has 25 bills totaling $230. How many of each bill does he have?

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  1. Let x: 5 bill
    let y: 10 bill
    x + y = 25
    5x + 10y = 230

    5x + 10(25-x) = 230
    5x + 250 -10x = 230
    -5x = -20
    x = 4
    y =21

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  2. This helped me a lot thanks.

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