Answer:
Jake's age = 18.
Explanation:
Given : Mindy is 39 years old. Mindy's age is 3 years older than two times Jake's age.
To find : How old is Jake.
Solution : We have given Mindy is 39 years old.
Let the Jake's age = x .
According to question :
Mindy's age is 3 years older than two times Jake's age.
Mindy's age = 2x ( Two times of Jake's age )
Mindy's age = 2x + 3 ( Three more than Jake's age ) .
39 = 2x + 3 .
On subtracting both sides by 3
39 -3 = 2x .
36 = 2x .
On Dividing both sides by 2 .
18 = x
Therefore, Jake's age = 18.