Question
The ratio of Evan's pens to Amelia's pens at first was 2 : 5. After Evan gave Amelia 39 pens, the ratio of Evan's pens to Amelia's pens is 1 : 4. What was the number of pens they had altogether?
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The ratio of Evan's pens to Amelia's pens at first was 2 : 5. After Evan gave Amelia 39 pens, the ratio of Evan's pens to Amelia's pens is 1 : 4. What was the number of pens they had altogether?