Answer: 41.5 dollars
Step-by-step explanation: All I did was try to balance them out.
This is probably not the way to do it, but this is how I did it.
93 - 10
I just take 10 from him and give it to her.
83 - 20
Then I just keep doing that
73 - 30
63 - 40
53 -50
Now I'm almost there, I'll take 1.5 from him and give it to her.
51.5 - 51.5
Now I subtract 51.1 from 83
And I now have 41.5.
41.5 is what he needs to give to her to make it even.
Hope that helps!