David and Elijah each spent the same amount of money. David has 1/4 of his money left and Elijah had 3/5 of his money left. What was the ratio of the amount of money David had at first to the amount of money Elijah had at first? (1) 4:5 (2) 9:2 (3) 12:5 (4) 8:15

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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David and Elijah each spent the same amount of money. David has 1/4 of his money left and Elijah had 3/5 of his money left. What was the ratio of the amount of money David had at first to the amount of money Elijah had at first? (1) 4:5 (2) 9:2 (3) 12:5 (4) 8:15
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