2(7/2)^x = 49/2
Divide both sides by 2:
(7/2)^x = 49/4
I notice that 49/4 can be rewritten as (7/2)^2, so we now have:
(7/2)^x = (7/2)^2
The only way for this to be true is if x = 2.  Thus, we are done.
        
             
        
        
        
Perimeter = 2w + 2l
2(8x+2) + 2(6x + 6)
Use distributive property 
16x + 4 + 12x + 12
Combine like terms 
28x + 16
Solution: 28x + 16
        
                    
             
        
        
        
1) 108
2) 72
3) 36
4) 72
5) 72
6) 144
7) 72
8) 72
9) 108
10) 108
I hope this helped