Question
Risa, Jen and Shiyun had a collection of erasers. 12 of Risa's erasers is equal to 23 of Jen's erasers. Jen had 9 erasers fewer than Shiyun. If they had 99 erasers altogether, how many erasers did Risa have?
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Risa, Jen and Shiyun had a collection of erasers. 12 of Risa's erasers is equal to 23 of Jen's erasers. Jen had 9 erasers fewer than Shiyun. If they had 99 erasers altogether, how many erasers did Risa have?