Answer: Didn't read it yet. :">
Wiles became interested in the solution to the problem known as Fermat's Last Theorem
a)

b)
First of all, I divided both sides by 2, simplified, and then subtracted x from both sides. Then, I got the final result for 'a'.
a) Solving the equation
Given the expression

Divide both sides by 2

simplify

subtract x from both sides


Thus, the value of a:

b) Work Process
First of all, I divided both sides by 2, simplified, and then subtracted z from both sides. Then, I got the final result for 'a'.