Question
The ratio of Harris's erasers to Zoey's erasers at first was 3 : 7. After Harris gave Zoey 54 erasers, the ratio of Harris's erasers to Zoey's erasers is 1 : 3. What was the number of erasers they had in all?
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The ratio of Harris's erasers to Zoey's erasers at first was 3 : 7. After Harris gave Zoey 54 erasers, the ratio of Harris's erasers to Zoey's erasers is 1 : 3. What was the number of erasers they had in all?