Question
The ratio of Samantha's marbles to Ethan's marbles at first was 3 : 7. After Samantha gave Ethan 40 marbles, the ratio of Samantha's marbles to Ethan's marbles is 1 : 4. What was the number of marbles they had altogether?
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The ratio of Samantha's marbles to Ethan's marbles at first was 3 : 7. After Samantha gave Ethan 40 marbles, the ratio of Samantha's marbles to Ethan's marbles is 1 : 4. What was the number of marbles they had altogether?