Question 565318
first you want to get your (2x) by itself so you subtract 6 from both sides of your equation. 2x + 6 =30
                  - 6  -6        
               ___________
               2x     =24
*your 6's will cancel out. 
now you want x by itself so you divide both sides by 2.
               2x =24
               /2  /2
                x= 12
*your 2's canceled to get you x by itself.