Question

Tom is 10 years older then Carrie. 5 years ago, Tom was twice as old as Carrie. How old is Carrie?

Answer 1

Carrie is 15 years old

Answer 2

Let T be Tom's age and C be Carrie's age.
To form Equation 1
T = C + 10
T - C = 10
To form Equation 2
T - 5 = 2(C-5)
T - 2C = -5

Solving both equations, C=15 and T=25.
Carrie is 15 years old (Option D)