First subtract the 2 to isolate the 7x. Remember what you do to one side you do to the other, so then you would subtract 2 from 30 as well giving you 7x=28. After that in order to isolate x, you would divide by 7 on both sides giving you x=4.
The answer is a. It portrays Athens as being unique, innovative, and influential.
Cultural unity was less apparent than its diversity, Africa is home to 2000 distinct languages.
