Answer:
21. is 18 dollars
22. is 75 dollars
Step-by-step explanation:
 
        
                    
             
        
        
        
1. Regroup terms
x^3 - 6 * 10x^2x-8/ x-3
2. Use product rule
x^3 - 6 * 10x^ 2+1 - 8/ x-3
3. Simplify
x^3 - 6 * 10 x^3 - 8/ x-3
4. Simplify further
x^3 - 60x^3 - 8/ x-3
5. Simplify the last time
-59x^3-8/x-3
        
             
        
        
        
Is it 3b-2a=5a-6
or
3b+2a=5a-6
you are missing the sign of 2a
        
             
        
        
        
The answer is 8, just divide 6 by 48. Hope it helped.