Question
The ratio of Tommy's coins to Evelyn's coins at first was 3 : 7. After Tommy gave Evelyn 112 coins, the ratio of Tommy's coins to Evelyn's coins is 1 : 3. What was the number of coins they had altogether?
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The ratio of Tommy's coins to Evelyn's coins at first was 3 : 7. After Tommy gave Evelyn 112 coins, the ratio of Tommy's coins to Evelyn's coins is 1 : 3. What was the number of coins they had altogether?