A student saves money to buy a laptop. The student already has $ 307.50 saved and puts aside $ 100 each month to help pay for the laptop. After 5 months, the total amount saved is 75 % of the total cost of the laptop. How much more does the student need to save to buy the laptop rounded to the nearest cent?

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!