19x - x = 2x
Can u help with this

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.

answe: it will take 4.5 hours for naomi and clair to paint an equal number of square feet

hope i

-lavira : )

the anwser is x< -17/2