when you multiply throught with the lcd

you end up with

Code: Select all

`36+36 = 5(x+3)(x-3)`

- Sun Aug 12, 2012 11:35 pm
- Forum: Beginning Algebra
- Topic: word problem has me stumped.
- Replies:
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**3763**

(x+3)(x-3) is your lcd. Sorry i should have mentioned that in my 4 or 5th post.

when you multiply throught with the lcd

you end up with
hope that makes sense

when you multiply throught with the lcd

you end up with

Code: Select all

`36+36 = 5(x+3)(x-3)`

- Sun Aug 12, 2012 6:50 pm
- Forum: Beginning Algebra
- Topic: word problem has me stumped.
- Replies:
**7** - Views:
**3763**

ok the equation is this.
hope this is helpful for someone else someday. thanks for the 1 response.

Code: Select all

`36/x-3 + 36/x+3 = 5(x+3)(x-3)`

- Sun Aug 12, 2012 2:13 pm
- Forum: Beginning Algebra
- Topic: word problem has me stumped.
- Replies:
**7** - Views:
**3763**

Here is what i have so far I'm i on the rigth track?

speed of boat against stream x-3

speed of boat with stream x+3

however i think my equation is wrong.

I end up with something like this?

36/x-3 = 5 but im not sure what i should be doing about the other side of the equation

speed of boat against stream x-3

speed of boat with stream x+3

however i think my equation is wrong.

I end up with something like this?

36/x-3 = 5 but im not sure what i should be doing about the other side of the equation

- Sun Aug 12, 2012 1:33 pm
- Forum: Beginning Algebra
- Topic: word problem has me stumped.
- Replies:
**7** - Views:
**3763**

Thanks for the response.

- Sun Aug 12, 2012 1:11 pm
- Forum: Beginning Algebra
- Topic: word problem has me stumped.
- Replies:
**7** - Views:
**3763**

I have a word problem that i cant seem to figuered out. Can someone point me in the right direction. A boat cruises 36mi against a 3mph current and 36 mi back in the direction of the same current. The round trip takes 5 hours what is the speed of the boat in still water? I have drawns pictures look ...