19. A has several tables, B has several chairs. If B exchanges all the chairs for an equal number of tables, B needs to pay A an additional 320 yuan. If B does not pay, they would receive 5 fewer tables. It is known that the price of 3 tables is 48 yuan less than the price of 5 chairs. How many chairs did B originally have?
19. Party A has several tables, and Party B has several chairs. If Party B exchanges all the chairs for an equal number of tables, Party B needs to pay an additional 320 yuan to Party A. If Party B does not pay extra, they will receive 5 fewer tables. It is known that the price of 3 tables is 48 yuan less than the price of 5 chairs. How many chairs did Party B originally have?
【Solution】(1) How much does each table cost?
$$
320 \div 5=64 \text { (yuan); }
$$
(2) How much does each chair cost?
$$
(64 \times 3+48) \div 5=48 \text { (yuan); }
$$
(3) How many chairs did Party B originally have?
$$
320 \div(64-48)=20 \text { (chairs); }
$$

Answer: Party B originally had 20 chairs.