Patty is taking out a simple interest loan to buy her new $10,689 car. how much would she pay in interest if the rate is 4.5% and she pays the loan off in 4 years?

I = PRT
P = 10689
R = 4.5% (turn this to a decimal) = 0.045
T = 4

I = (10689)(0.045)(4)
I = 1924.02 <==

1. isolate the variable, in this case, d. subtract 35.5 on both sides of the equation.2. 52 subtracted by 35.5 is 16.53. therefore your answer would be d= 16.5this is the basics of pre algebra, isolating variable through adding, subtracting, multiplying, and dividing, if you have any other questions to ask just comment!