Question
The ratio of Joseph's buttons to Hannah's buttons at first was 3 : 7. After Joseph gave Hannah 15 buttons, the ratio of Joseph's buttons to Hannah's buttons is 1 : 4. What was the number of buttons they had in all?
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The ratio of Joseph's buttons to Hannah's buttons at first was 3 : 7. After Joseph gave Hannah 15 buttons, the ratio of Joseph's buttons to Hannah's buttons is 1 : 4. What was the number of buttons they had in all?