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In a certain performance of a 3-act play, the first act was

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In a certain performance of a 3-act play, the first act was [#permalink] New post 25 Jul 2003, 20:35
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In a certain performance of a 3-act play, the first act was 18 minutes shorter than the third act and half as long as the second act. If the average (arithmetic mean) length of the 3 acts was 46 minutes, how many minutes long was the third act?
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Re: PS: Three Variables; impossible to solve [#permalink] New post 25 Jul 2003, 21:08
Curly05 wrote:
In a certain performance of a 3-act play, the first act was 18 minutes shorter than the third act and half as long as the second act. If the average (arithmetic mean) length of the 3 acts was 46 minutes, how many minutes long was the third act?


Everything variable can be expressed in terms relative to one act so you really have only one variable here. Make some effort...
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MBA, Anderson School of Management, UCLA, Class of 1993

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piece of cake, Curly [#permalink] New post 26 Jul 2003, 03:06
I - X
II - 2X
III - X+18
Total 46*3=138

4X=120, => X=30 =>

I - 30
II - 60
III - 48
Total check 30+60+48=138

AkamaiBrah, you must be a very patient person to keep yourself calm when someone faces difficulties with problems of this kind. No offence to you, Curly!
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Akami [#permalink] New post 26 Jul 2003, 05:11
More like don't overlook things; thank you akami and lynn.
Akami   [#permalink] 26 Jul 2003, 05:11
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In a certain performance of a 3-act play, the first act was

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