Show your working and answers clealy in this form.
1. The number of shells in Box A was 12 more than that in Box B. When 96 shells were transferred from Box A to Box B, the number of shells in Box B became 3 times that of Box A. Find the total number of shells in Box A at first.
2. The number of sweets in Container X was 24 more than that in Container Y. When I removed 42 sweets fom Container X and placed them in Container Y, the number of sweets in Container Y became thrice that in Container X. Find the number of sweets in Container X at first.
3. Mrs Tan baked 30 more muffins than Mrs Krishnan. After Ms Krishnan gave 15 muffins to Mrs Tan, Mrs Tan had twice as many muffins as Mrs Krishnan. How many muffins did Mrs Tan have at first?
4. Jerry had $40 more than Tommy at first. After Jerry gave Tommy $60, Tommy had twice as much money as Jerry. Find the amount of money Jerry had at first.
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