Question

Kevin is currently twice as old as his brother. If Kevin was eight years old two years ago, how old is Kevin's brother now?

Answer 1

So first you add 8 and 2 to get 10. This means that Kevin is 10 years old now. If he is currently twice as old as his brother it means that you divide 10 by 2 to get 5. Kevin's brother is 5 years old.

Answer: 5 years old

Answer 2

k = 2b
k - 2 = 8
 
k - 2 = 8
 
Add 2 to both sides:
 
k = 10
 
Plug in 10 for 'k' in the first equation:
 
10 = 2b

Divide 2 to both sides:

b = 5

So his brother is 5 years old now.