1. Solve the problem, assigns 'o' if sales full, "1" if sales are steady, "2" if sales rise moderately, and "3" if sales rise a lot.
A firm uses trend projection and seasonal factors to simulate sales for a given time period.
The simulator generates the following output
0102 2001 2020 2022120122 20 3002121
Estimate the probability that sales will remain steady,

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.