Question
PSLE
Seth had tarts and Vincent had macarons. Both gave half of what they had to each other. Seth sold 9 tarts and Vincent sold 40 macarons. In the end, the ratios of tarts to macarons for Seth and Vincent were 1 : 4 and 1 : 2 respectively. How many tarts did Seth have at first?
4 m

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PSLE
Seth had tarts and Vincent had macarons. Both gave half of what they had to each other. Seth sold 9 tarts and Vincent sold 40 macarons. In the end, the ratios of tarts to macarons for Seth and Vincent were 1 : 4 and 1 : 2 respectively. How many tarts did Seth have at first?