Question
John gave 211 of his erasers to Ahmad, 311 of his erasers to Rael and 211 of his erasers to Eric. He then had 40 erasers left. How many erasers had he at first?
4 m

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John gave 211 of his erasers to Ahmad, 311 of his erasers to Rael and 211 of his erasers to Eric. He then had 40 erasers left. How many erasers had he at first?