What two numbers have a product of -72 and a sum of 1?

-7 and 8 because adding them gets you 1 and 8x7=72, but the -7 makes it -72

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!