Question 565451
Here is the equation you need:

(x/2) + x + (x - 20) = 50

Solving for x, I got 28.

To find how many each spent, plug x for every person and simplify.


Allison = (x/2)


Allison = (28/2) or $14.


Jill = (x - 20)


Jill = 28 - 20 or $8

Bill = x

Bill = $28.

Bill spent more than the rest.  That's not fair!!


Here is the prove:

$14 + $8 + $28 = 50