Question
The ratio of the number of cupcakes to the number of wafers in a bakery was 4 : 5. After 4 cupcakes and 7 wafers were packed into each box, there were a total of 20 cupcakes and 15 wafers left. Find the total number of cupcakes and wafers in the bakery at first.
4 m

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The ratio of the number of cupcakes to the number of wafers in a bakery was 4 : 5. After 4 cupcakes and 7 wafers were packed into each box, there were a total of 20 cupcakes and 15 wafers left. Find the total number of cupcakes and wafers in the bakery at first.