Question

he loves all his sons equally well (change the degree of comparison)

Answer 1

He does not love one of his sons better than the others.

Explanation:

While changing the degree of comparison, one must be cautious about not changing the meaning of the sentence. The above sentence is in the positive degree. Here, the adjective is 'well'. It is in unaltered form in the sentence.  

So, to turn the sentence into a comparative degree, it is better to convert the affirmative sentence to negative. The comparative form of 'well' is 'better'.  

Therefore, by changing the sentence to negative, it gives the following meaning: The father does not show any partiality in showing love to his sons.  

Answer 2

Answer:

he does not love one of his sons better than the others