Hi!
If this doesn't make sense, basically what it's saying is that they are sharing $91, and for every 1 dollar Jayden gets, Aiden gets 6 dollars.
We can set the amount that Jayden gets equal to 'n', and the amount that Aiden gets as '6n', since he gets 6 times the number that Jayden receives.
We can set up the equation:
n + 6n = 91
add like terms
7n = 91
divide 91 by 7 to isolate n
n = 13
This means that Jayden receives 13 dollars, as "n" is equal to the amount Jayden receives.