Question
The ratio of Evan's erasers to Isaiah's erasers at first was 3 : 7. After Evan gave Isaiah 84 erasers, the ratio of Evan's erasers to Isaiah's erasers is 1 : 3. What was the number of erasers they had in all?
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The ratio of Evan's erasers to Isaiah's erasers at first was 3 : 7. After Evan gave Isaiah 84 erasers, the ratio of Evan's erasers to Isaiah's erasers is 1 : 3. What was the number of erasers they had in all?