Word problem

Question

If you double President Reagans ago at the time of his first inauguration and subtract his age at the time he died , the result is 45 years. He was 69 at his first inauguration. How old was president Reagan when he died?

Answer 1

Let I be his age at inauguration, and D be the age of death.

 

The first clue is 2I - D = 45.

 

You get:

 

D = 2I - 45 = 2·69 - 45 = 138 - 45 = 93

 

So he died at age 93.

 

This is indeed his age of death: https://en.wikipedia.org/wiki/Ronald_Reagan