Noemi lost $400 on roulette and $500 on blackjack. How much money did Noemi begin with if she still had $800 in her purse?
The total amount of money that she lost is $400+$500 = $<T>add(400, 500)=900
If she remained with $900, she initially had $900+$800 = $<T>add(900, 800)=1700
