An Egyptian merchant ship from 1500 BC was about 90 ft long and a Roman gallery was about 235 ft long. What is the ratio of the length of the Egyptian ship to the
Roman ship? Round your answer to the hundredths place.

Igot the answer of 15.8 years.

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.