Question
PSLE
Sam had shortbreads and Jeremy had cupcakes. Both gave half of what they had to each other. Sam sold 13 shortbreads and Jeremy sold 30 cupcakes. In the end, the ratios of shortbreads to cupcakes for Sam and Jeremy were 1 : 4 and 1 : 2 respectively. How many shortbreads did Sam have at first?
4 m

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PSLE
Sam had shortbreads and Jeremy had cupcakes. Both gave half of what they had to each other. Sam sold 13 shortbreads and Jeremy sold 30 cupcakes. In the end, the ratios of shortbreads to cupcakes for Sam and Jeremy were 1 : 4 and 1 : 2 respectively. How many shortbreads did Sam have at first?