Question 1125303
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Amy and Brian go to shop to buy a bag. However, Amy is 200 {{{highlight(pesos)}}} short, and Brian is 2400 {{{highlight(pesos)}}} short. 
Even if they combine their money, they still can't afford the bag. How many pesos does the bag cost?
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            It is a classic entertainment problem,  but in your post it is posed  INCORRECTLY.


            With this condition the problem  HAS  NO  a unique solution.


            Some vitally important part is missed in the post.


            Check your source and then edit the post.


            Then re-submit.



<pre>
The logic behind this problem is THIS:


Let the bag costs C pesos.


Then, according to the condition,  


    Anmy has  (C-200)    pesos;
    Brian has  (C-2400)  pesos;
    Together, they have (2C-2600) pesos,

    and it is still not enough, i.e.  2C-2600 < C.     (*)


From this inequality, you only can say that  C < 2600.


You can also add that  C > 2400.


So, the compound inequality  2400 < C < 2600  is ALL that we can extract from this condition.
</pre>


Had the condition says, &nbsp;<U>instead of (*)</U>,  &nbsp;how much they are short &nbsp;<U>together</U>, &nbsp;then it would create an additional equation 
to solve the problem by an unique way.


So, &nbsp;again, &nbsp;the condition is INCORRECT and requires to be corrected.