A = 5/6(B + C)
multiply 6 on both sides
6A = 5(B + C)
divide 5 from both sides
6A/5 = B + C
subtract B from both sides
6A/5 - B = C
 
        
             
        
        
        
169 miles * 5280 ft/ mile = 892320 ft
3 hours * 60 minutes/1 hr = 180 minutes
3 hrs 30 minutes = 180 minutes + 30 minutes = 210 minutes
169 miles/ 3 hrs 30 minutes    = 892320 ft/ 210 minutes = 4249.1 ft/ minutes
 
        
             
        
        
        
5% = 2.30pounds
2.30 ÷  0.05 = 46 pounds 
        
             
        
        
        
Anything else? there isnt a question.