Claire's credit card charges an annual rate of 5% simple interest. The balance on her card is $300, and he makes interest-only payments for one year. How much interest will he have paid by the end of that year?

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!