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A cashier at Apex Parts received a check for $2,380 for 59 parts. The parts cost $20 and $50 but the number wanted of each wasn't given. How many of each can be bought with that amount?
Alan needs 250 ml of a solution that is 45% alcohol. If he has a solution that is 50% alcohol and purified water (which is 0% alcohol), how much water should he use?
Floyd has 16 coins in pennies, nickels, and dimes. The number of dimes is equal to the sum of the number of pennies and number of nickels. If the total value of the coins is $1.08, how many of each kind does he have?
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