48 fluid ounce it is $0.40 per fl oz, while the other one is $0.60 per fl oz
        
             
        
        
        
             rs + st = rt     Plug in the values
3x + 1 + 2x - 2 = 64   Combine like terms (1 and -2)
       3x -1 + 2x = 64   Combine like terms (3x and 2x)
            -1 + 5x = 64   Add 1 to both sides
                  5x = 65   Divide both sides by 5
                    x = 13
        
             
        
        
        
combining like terms in a polynomial is adding or subtracting together terms that have the same degree in the exponents. 
example. 3x^3 + 5x^6 + 2x^3 +7x + 9x^6
= 7x + 5x^3 + 14x^6
 
        
             
        
        
        
If you do width times length you will get 30. Good luck