Answer:
3 + x for both. They did the same amount.
Explanation:
Will volunteered 3 hours in march. In April, he volunteered the same amount plus the same amount at Lydia did in March. Since we don't know Lydia's then this is x. So in April, Will volunteered 3 + x.
Hector volunteered 5 hours in March. But in April, he volunteered 2 less than March which 5-2 = 3. Plus he did the same amount as Lydia in March. So his expression is 3+x.
Will and Hector did the same amount of hours.