The Finch Formerly Known As Gold

29 December 2005

Google algebra?

This Google query came in this morning:

How old is this person? In two years she'll be twice as old as she was five years ago.

I know Google can do arithmetic, but I wasn't aware that they could solve equations for x. (And if they could, there would have been no reason to send this poor shlub to my site.)

By the way, she's twelve.

Posted at 8:10 AM to PEBKAC


Posted by: McGehee at 9:37 AM on 29 December 2005

Oops -- I solved before I saw the last line of the post.

Posted by: McGehee at 9:38 AM on 29 December 2005

x+2 = 2(x-5)

x+2 = 2x-10

add 10 and subtract x from both sides:

x+2+10-x = 2x-10+10-x

12 = x

In case future Googlers wonder how McGeehee knew :)

Posted by: Matt at 12:38 PM on 29 December 2005

Which will be incorporated into a future Google enhancement called "ShowYourWork."

Posted by: CGHill at 1:22 PM on 29 December 2005