Answer:
uncle Alan age 48 and cousin Lisa age 24
aunt Marengo age 42 and cousin dale age 21
uncle Brad age 36 and cousin Kan age 18
Explanation:
Firstly, the age ratio of crystals and Alexa should be computed to know the ages of the family member pair that have same ratio.
The age of Crystal is 12 years and the age of Alexa is 6 years. The fraction of their age is 12/6 = 2/1. So the ratio of Crystal age to Alexa age is 2:1. We have to find the family member pair with ratio of 2:1.
uncle Alan age 48 and cousin Lisa age 24 have same ratio. 48/24 = 2/1 = 2:1
aunt Marengo age 42 and cousin dale age 21 have same ratio . 42/21 = 2/1 = 2:1
uncle Brad age 36 and cousin Kan age 18 have same ratio. 36/18 = 2/1 = 2:1