Terry has a collection of 50 coins. There are only quaraters and dimes in the collection. The total value of hte coins is $8.00. How many dimes does he have?
+36916 d = #dimes value = 10d
q = quarters = (50-d) value = 25(50-d) summed = 800
10d + 25(50-d) = 800 solve for 'd' the number of dimes then # quarters = 50 - d
