the sum of the ages of Will and Anna is 20. if will is 4 years older than Anna, how old is he. then how old is anna

Will is 14 years old and Anna is 6 years old.

Explanation:

If both of them had the same exact age, both of them would be ten years old. If will was 4 years older, you would add 4 years to Will and subtract Anna's age by 4.

I think will is 14 and Anna is 6