17. A young man allocates his monthly salary as follows: half of his monthly salary is deposited in the bank, half of the remaining money minus 300 yuan is used to pay the mortgage, and half of the remaining money plus 300 yuan is spent on meals. This leaves him with 800 yuan. What is the young man's monthly salary in yuan?
【Answer】 7600 yuan
【Solution】 By using the reverse method, if the final remaining amount is 800 yuan, then according to the statement "half of the remaining money plus 300 yuan was spent on meals," we can get the remaining amount as $(800+300) \times 2=2200$ (yuan); then, according to the statement "half of the remaining money minus 300 yuan was used to pay the mortgage," we can get the remaining amount as (2200-300) $\times 2=3800$ yuan; finally, according to the statement "half of the remaining money was deposited in the bank," we can get the monthly salary as $3800 \times 2=7600$ yuan.