Reshmi has a roadmap with a scale of 1 cm representing 18km. She drives on a road for 72km. What would be her distance covered in the map.

y = x + 95

y = 42 + 95

y=137 mm hg

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.