Answer: hope it helps 
Step-by-step explanation:
2x+11 absolute value equals 2x+11, then 2x+11=7, subtract 11 from itself, and 7 you get 2x=4 divide both sides by 2 an you get -2=x.
 
        
             
        
        
        
(4x2) + (3x1)=11
I think that's right, can you have a plus sign
        
             
        
        
        
2.1 x 10^10/ 7 x 10^17 
= 3 x 10^-8
hope this helps and have a great day :)