Question
Lau bought some erasers for his class of 50 students. 19 students received a total of 40 erasers while the rest of the students received 3 erasers each. How many erasers did Lau buy?
2 m

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Lau bought some erasers for his class of 50 students. 19 students received a total of 40 erasers while the rest of the students received 3 erasers each. How many erasers did Lau buy?