Hi!
So really focus on the fact that he started at $230, and then added an amount of money which we'll call x, which made his total equal $599. 
Take the parts I put in bold, and write the equation.
$230 + x = $599
Now we need to find x. 
Whatever we do to the equation, we do it to both sides. 
Our goal is to isolate x on one side. 
Subtract 230 from both sides. 
$230 - $230 + x = $599 - $230
x = $369
The answer is A. $230 + x = $599 x = $369
Hope this helps! :)
-Peredhel
        
             
        
        
        
4/15
Multiple the numerator by numerator, and denominator by denominator, then simplify
        
             
        
        
        
3 4/5 because if 5 only goes into 19 3 times and then there is 4/5 left
        
                    
             
        
        
        
180% from the selling price to the wholesale
        
             
        
        
        
Answer:
$3
Step-by-step explanation:
17 - 5 = 12 divided by 4 = 3