Question
The ratio of David's coins to Jackson's coins at first was 3 : 7. After David gave Jackson 18 coins, the ratio of David's coins to Jackson's coins is 1 : 3. What was the number of coins they had in total?
2 m

Click button first when a symbol is required. X

The ratio of David's coins to Jackson's coins at first was 3 : 7. After David gave Jackson 18 coins, the ratio of David's coins to Jackson's coins is 1 : 3. What was the number of coins they had in total?