You have a total of 25 coins consisting of 10 and 5 cents. The total value is 3.85. How do you find the number of 10 centavo coins and 5 centavo coins?
The given situation is impossible (unless you can have a negative number of coins)
Even if all 25 coins were 10 centavo coins, they would only make up $2.50
If you are willing to detach yourself from reality, you could claim the answer is 52 of 10-centavo and -27 of 5-centavo coins.