Question 1143710
Ann has a piggy bank with 48 coins, all of which are dimes and nickels. The total amount of money in the piggy bank is $3.90. How many more dimes are there than Nickles? 
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If they were all nickels, it would be $2.40 or 240 cents
Each nickel replaced by a dime add 5 cents
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390 - 240 = 150
150/5 ---> 30 replacements by dimes.
---> 30 dimes, 18 nickels
12 more dimes
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Why is anyone concerned about such a small amount of money?