October 7th, 2015, 05:00 PM  #1 
Newbie Joined: Oct 2015 From: sacramento Posts: 7 Thanks: 0  Hard problem!
A bat and a ball cost one dollar and ten cents in total. The bat costs a dollar more than the ball. How much does the ball cost? 
October 7th, 2015, 07:15 PM  #2 
Senior Member Joined: Apr 2014 From: Europa Posts: 584 Thanks: 177  $\displaystyle \color{blue}{\begin{cases}x+y=1.10\\ xy=1 \end{cases}}$ 

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