The total amount of money that she lost is $400+$500 = $<<400+500=900>>900

If she remained with $900, she initially had $900+$800 = $<<900+800=1700>>1700

# Answer

1700
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Noemi lost $400 on roulette and $500 on blackjack. How much money did Noemi begin with if she still had $800 in her purse?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
1700
Noemi lost $400 on roulette and $500 on blackjack. How much money did Noemi begin with if she still had $800 in her purse?
train