lily just paid off a $400 loan. she had to pay $60 in interest at a simple annual interest rate of 5%. how many years did lily have this loan?

a. 2
b. 3
c. 4.5
d. 5

 The correct option is (B) 3.

Step-by-step explanation:  Given that Lily  just paid off a $400 loan. She had to pay $60 in interest at a simple annual interest rate of 5%.

We are to find the number of years for which Lily had this loan.

Let n be the required number of years.

Also, P = $400, S.I. = $60 and r% = 5%.

Therefore, by the formula of simple interest, we have

Thus, the required number of years is 3.

Option (B) is CORRECT.

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.