Which equation shows a valid step in solving 3/2x-6+3V/2x+6=0?

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.

t= 1/3.

hope this .

step-by-step explanation:

how many friends does he have? i think some of the information got cut off in the problem.