<h3>First we will simplify both equations....</h3><h2>#1</h2>

<h2>#2</h2>

<h2>Now,</h2>

<h2>How?</h2>
- When the number is in negative the smaller number is greater than the greater number.
If 1/3 of the oranges were spoiled and you threw away 4 oranges, there would be a total of 12 oranges.
4 x 3 = 12
If 1/4 of the grapefruits were spoiled and you threw away 7 grapefruits, there would be a total of 28 grapefruits.
7 x 4 = 28
Add the total amount of oranges to the total amount of grapefruits and you get how many pieces of fruit were in the basket.
12 + 28 = 40
Initial amount of money: $800
After paying the cab driver $20 ; money = $800 - $20 = $780
Giving his mother 1/3 of the remaining amount, leaving him with 2/3 of it.
money = ($780) x (2/3) = $520
Giving his aunt 1/4 of the remaining amount, leaving him with 3/4 of it.
money = ($520)(3/4) = $390
Giving his friend 1/6 of the remaining amount, leaving him with 5/6 of it.
money = ($390)(5/6) = $325
Therefore, the amount of money Bob gets to keep is equal to $325.