Question 920975: Tisha has 11 coins worth $6.25. If the coins are all loonies and nickels, how many loonies and nickels does she have?
Answer by josgarithmetic(39617)   (Show Source):
You can put this solution on YOUR website! Not knowing the value of a loony, this could give an inequality (because of the limited nickels value) and then two equations in three unknowns. Playing with the given values all in the head, if a loony is 1.00 dollar, then 6 loonies is $6.00, and that leaves remaining 0.25 dollars, which could be worth 5 nickels. There are your 11 coins:
6 loonies plus 5 nickes, making 11 coins, and value sum to $6.25.
I could not find a more formal arithmetic method.
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