Answer: mothers age = 45 years old
Explanation:
mothers age = 22 + x
daughters age= x
create the equation:
22 + x + x = 68
2x = 68 - 22
2x = 46
x = 23 (daughters age)
in order to get the mother's age you should add 22 to daughter's age (23) as they say the mother is 22 years older than the daughter
therefore: 22 + 23 = 45 years old