Anthony needs to order some new supplies for the restaurant where he works. The restaurant needs at least 759 forks. There are currently 319 forks. If each set on sale contains 20 forks, use the drop-down menu below to write an inequality representing ss, the number of sets of forks Anthony should buy.

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.