HELP ME :( What is the solution to the system of equations?

[3x + 2y = 39
[5x - y = 13

○ (4, 7)
○ (7, 4)
○ (12, 5)
○ (5, 12)

D 5,12

Step-by-step explanation:

did it on my test and got it correct

are ya tryin to ask something or is this a statement

the revenue of the fitness center, y, is the product of two factors: the number of members and the fee paid by each member. there are 320 members now, but number of members goes down by 10 for each $5 increase in fees, so if x is the number of $5 price increases then members is equal to (320 - 10x). since the fee is currently $45, and the fee increases by $5 for every price bump x, the fee is given by (45 + 5x). so, revenue y is given by y = (320 - 10x)(45 + 5x).