Question 894973
Let A = Abigail

Let B = Bethany


A = B - 28
A + B = 66


B - 28 + B = 66

2B - 28 = 66

2B = 66 + 28

2B = 94

B = 94/2

B = 47.

Bethany is 47.


How old is Abigail?


Think for a minute.

If I subtract 47 from the total of their ages, I will know Abigail's age, right?


So, Abigail is 66 - 47 or 19.

Abigail is 19 and Bethany is 47.