Dojo
Admin
Number of posts : 154
Location : Probably somewhere near a computer
Registration date : 2008-08-12
 | | Subject: Lesson 1, Problem 3 Sat Aug 16, 2008 1:03 pm | |
| Find x in all the following:
a) 2x=4
b) 5x=25
c) 39x=3 | |
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isabella2296
Admin
Number of posts : 45
Location : You'd really like to know, wouldn't you?
Registration date : 2008-08-16
| | Subject: Re: Lesson 1, Problem 3 Sat Aug 16, 2008 1:08 pm | |
| - Dojo wrote:
- Find x in all the following:
a) 2x=4
b) 5x=25
c) 39x=3 a) x = 2 b) x = 5 c) x = 13 | |
|
AIME15
Hardcore TMF user
Number of posts : 163
Age : 27
Location : Pleasanton, CA
Registration date : 2008-08-13
| | Subject: Re: Lesson 1, Problem 3 Sat Aug 16, 2008 1:39 pm | |
| Izzy on c, your wrong.
39x=3: divide by 39 to get
x=3/39
so x=1/13, not 13. | |
|
Dojo
Admin
Number of posts : 154
Location : Probably somewhere near a computer
Registration date : 2008-08-12
| | Subject: Re: Lesson 1, Problem 3 Sat Aug 16, 2008 3:31 pm | |
| AIME15 is right on c. That's the little trick I thought I'd put in.  | |
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isabella2296
Admin
Number of posts : 45
Location : You'd really like to know, wouldn't you?
Registration date : 2008-08-16
| | Subject: Re: Lesson 1, Problem 3 Sat Aug 16, 2008 3:53 pm | |
| Oops, I thought it said 3x = 39. | |
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| | Subject: Re: Lesson 1, Problem 3 | |
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