mlov83 wrote:(x+3)(x-3) is your lcd. Sorry i should have mentioned that in my 4 or 5th post.
Yes. But what does the right-hand side of your equation stand for?
when you multiply throught with the lcd
you end up with
hope that makes sense
If your equation is as you had posted:. . . . .
...then your equation stands for "(time for the first part) plus (time for the second part) equals (time for the total) multiplied by (the LCD of ??)". What sense does that make?
Instead, try using the set-up method and logic outlined in the lesson at the link provided earlier
. This will let you set up a logical equation, being "(part of the time) plus (the rest of the time) equals (the total time)".
equation, and you'll get an answer that works in the original exercise!