A. The hexagon as the series is adding a side each time. So you started with 3, 4, 5...

First, solve the parentheses:

Next, the exponential terms

Solve the multiplication:

Add and subtract:
Answer:
x = 23/7
Step-by-step explanation:
7 x + 15 equals 38
7x+15 = 38
Subtract 15 from each side
7x+15-15 = 38-15
7x = 23
Divide each side by 7
7x/7 = 23/7
x = 23/7
45x to the 3rd power y divided by 9xy
5x to the 3rd power y