Answer:
(a)
(b) 27 years
(c) 23 years
Explanation:
Let x years be Sarah's age when they married.
Sarah is four years older than John, then x - 4 years is John's age when they married.
John and Sarah have been married for exactly 37 years, then after 37 years,
John's age = x - 4 + 37 = x + 33 years
Sarah's age = x + 37 years
In the current year, the sum of their ages is 124, so
(a) The equation that represents the unknown ages in terms of Sarah's age when they were first married is

(b) Solve this equation

(c) John's age is
