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a bank teller has a total of 124 bills in fives and tens. the total value of the money is $840. how many of each kind does he have?

  • geometry -

    Let x = $5 bills and y = $10 bills

    x + y = 124

    x = 124-y

    5x + 10y = 840

    Substitute 124-y for x in third equation and solve for y. Insert that value into the first equation and solve for x. Check by inserting both values into the last equation.

  • algebra -

    How does your problem relate to geometry?

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