Question:
Isabella saved 2 coins in her new piggy bank each day. Each coin was either a 20¢ or a 50¢ coin. Her father also helped by putting in a $1 coin in her piggy bank every 7 days. The total amount of money in the piggy bank after 196 days was $137.90.
a) How many coins were there in the piggy bank altogether?
b) How many of the coins were 20¢ coins?
Solution:
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