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 10-21-2007 #3 hunter34 Guest   Posts: n/a Mr. Hui, you didn't follow one the problems parts. Show more: Let x be the number of $1.50 souvenirs sold, and y be the number of$2.50. So x+y=200, this means that y=200-x. Now solving the equation: $ \begin{eqnarray*} 1.50x+2.50(200-x)&=&380\\ 1.50x-2.50x+500&=&380\\ -x&=&-120\\ x&=&120 \end{eqnarray*}$ Then, you can easily find y which is 80. So the Solution to set is that there are 120 $1.50 souvenirs and 80$2.50 souvenirs. Edit:You have to fix the Hide feature so it can cover latex. Edit by Temperal: You can use [more] instead. Last edited by Temperal; 10-21-2007 at 10:32 PM..