A furniture store is having a closing sale. All items in the store are 45% off. Jenny found a sofa she wants to buy with an original price tag of $989.?
Part 1
Which expression will find the price, in dollars, of the sofa after applying the sale?
O A.
989 - (989 - 45) The
OB.
989 - 0.45
OC.
989 - 989(45)
OD. 989 - 989(0.45)

The answer is b) 32 your welcome

Oh i'm sorry. didn't see the options

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.