Question
Box X and Box Y contained a total of 80 erasers. After 12 erasers were transferred from Box X to B, Box Y contained thrice as many erasers as Box X. How many erasers were there in Box X at first?
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Box X and Box Y contained a total of 80 erasers. After 12 erasers were transferred from Box X to B, Box Y contained thrice as many erasers as Box X. How many erasers were there in Box X at first?