I didn't get the first part of this but given the equation " A pig
weighs 30lb plus half its weight. How much does the pig weigh?", 60
is the only possible answer as stated below.

On Sun, 12 Jun 2005 09:55:13 -0400, "Somebody"
> wrote:

>
>"Dori A Schmetterling" > wrote in message
...
>> Well, just for fun try using any number other than 30 lb; it won't work.
>> Or, put another way, the pig has to weigh 60 lb for the statement to be
>> true.
>>
>> DAS
>>
>> For direct contact replace nospam with schmetterling
>> ---
>>
>> "+ Rob +" > wrote in message
>> nk.net...
>> [...]
>> >> >
>> >> > A pig weighs 30lb plus half its weight. How much does the pig weigh?
>> >>
>> >> ummm. 60 lbs. what did I win?
>> >
>> > The statement does not establish that 30lbs is half of the pig's
>> > weight.
>
>
>Let P equal the pig's weight. The statement can be expressed then as:
>
>P = 30 + .5P
>
>subtract .5P from both sides
>
>.5P = 30
>
>multiply both sides by 2
>
>P = 60
>
>Therefore the pig weighs 60 pounds.
>
>-Russ.
>