Homework Help: Math

Posted by Maria on Sunday, January 2, 2011 at 9:52pm.

I don't get page 50 of algebra with pizzazz!
Please help?
7) Kathy is 6 years younger than bill. 12 years ago bill was twice as old as Kathy was then. How old are they now?

Math - Reiny, Sunday, January 2, 2011 at 10:33pm
let Bill's present age be x
then Kathy's present age is x-6

12 years ago:
Bill was x-12
Kathy was x-6 - 12 or x - 18

at that time bill was twice as old as Kathy --- x-12 = 2(x-18)

x-12 = 2x - 36
-x = -24
x = 24

so now bill is 24 and Kathy is 18
Math - Maria, Monday, January 3, 2011 at 9:17pm
Alright thanks I get it now (:
I guess I was just multiplying wrong.

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