The radioactive element carbon-14 has a half-fe of 5750 years. A scientist determined that the bones from a mastodon had lost 69.2% of their carbon 14 How old were the bones at the time they were discovered? The bones were about years old

Yuh yeet honestly idk

So the first thing we do is to multiply the top equation by 3. the reason i want to do this is i notice there will be a 6y on both equations and can possibly add/subtract them. so we get 6y = -3x + 27. adding that and the second equation we get 6x = 27-15 which is 12. divide by 6 and we get 2. ∴ x = 2. substituting 2 into the first equation we get 2y = -2 + 9 which is 7. divide by 2 and we get 7/2. ∴ y = 7/2, x = 2.