Question

James is five years older than David. The sum of
their ages is 89. How old is David?

Answer 1

Answer:

Let David's age be x years

=>  James' age = x+5 years

David + James = 89

=> x + x+5=89

=> 2x=84

=> x=84/2=42 years

David's age is 42 years

Answer 2

Answer:

If james is 5 years old than David then

1. subtract 5 from their sum of age
2. Then divide the answer with 2
3. There's the age of David

Ans is 42