Wendy can build a fort in 75 days, Al can build the same for in 50 days. They want to build a family fort this summer. If Wendy and Al work together on the fort, they will need at least how many days?

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!

20 percentage, you can also do it on a calculator.

The answer is 49/16 or 3 1/16