A floor plan of a basement is shown using a scale of 1 square inch to 20 square feet. If the basement has an area of 75 square inches on the drawing, what is the
actual area in square feet? (Hint: set up a proportion).

Answer is in the file below

cutt.ly/nz6VGda

y=sec x is the correct answer

~batmans wife dun dun

let x and 400 - x be the two numbers.  

==> 0.80x + 0.85(400 - x) = 400 - 68 from the statement of the problem.  

< ==> 0.80x + 0.85(400 - x) = 400 - 68  

==> 340 - 0.05x = 332  

< ==> -0.05x = -8 ==> x = 160, the first number ==> 400 - x = 240, the second number.