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Question

Sally had some $1 coins and Kelly had some $2 notes. Sally gave half of her coins to Kelly,and Kelly gave half of her notes to Sally.Sally used 12 pieces of the notes that Kelly had given her. Kelly used 18 pieces of the coins that Sally had given her. After that, the ratio of the number of notes to the number of coins that Kelly had was 1:4. Find the sum of money each of them had at first.
How to do?
Tks

Answer

                                                 Sally                                         Kelly

                                      Notes               Coins                Notes               Coins

Finally                            u-12                4u+ 18                 u                       4u

Before usage                 u                     4u + 18                                      4u + 18

Beginning                                            2 (4u + 18)            2u

Seems not enough information to solve, pls check the question again. Probably there should be some ratio between Sally’s notes and Kelly’s coins in the beginning.

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