Question
The ratio of Bryan's pens to Natalie's pens at first was 2 : 5. After Bryan gave Natalie 105 pens, the ratio of Bryan's pens to Natalie's pens is 1 : 4. What was the number of pens they had in all?
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The ratio of Bryan's pens to Natalie's pens at first was 2 : 5. After Bryan gave Natalie 105 pens, the ratio of Bryan's pens to Natalie's pens is 1 : 4. What was the number of pens they had in all?