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Upper primary school mathematics question UPQ123
In The Esplande library, the ratio of the number of boys to the number of girls was 5:3. After 6 boys left, there were 12 more boys than girls. How many boys were there at first?
Draw a math model based on the ratio,
From the model,
2 units = 18
1 unit = 9
Boys = 5 × 9 = 45 in the library at first