After a power failure, the temperature in the freezer increased at an average rate of 2.5℉ per hour. The total temperature was 7.5℉. Write and solve an equation to find the number of hours until the power was restored.

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!