What is the question asking?
        
             
        
        
        
Answer: $1,280
Step-by-step explanation:
The refund one a gallon is 50% of the cost of the gallon which is $0.32.
The refund on a gallon is:
= 50% * 0.32
= $0.16
If it was for 8,000 gallons the refund would be:
= 8,000 * 0.16
= $1,280
 
        
             
        
        
        
<u>9x</u> = <u>3y + 5</u>
 9         9
x = 1/3y + 5/9
x - 5/9 = 1/3y + 5/9 - 5/9
x - 5/9 = 1/3y
3(x - 5/9) = 1/3y · 3
3x - 1 2/3 = y
y = 3x - 1 2/3
        
             
        
        
        
 
x=4 y=5
if we put two pharases together 
the answer is as follows pic :
x=4 y=5