1, solution; Because the total price of their books is equal, and each language is more expensive than a math book by 0.5 yuan, then the unit price of that language or math can be obtained first. Taking the Chinese book as 100, its total price exceeds that of the math book 100(0.5x 100). The 50 yuan of this extra cost is that there are fewer Chinese books than math books (100-80)=20 Chinese books, so the price of each Chinese book is equal to (50).

20) yuan. Calculate according to the meaning of the question;

(0.5X 100)

( 100-80)

=50÷

20

=2.5 (yuan)

2.5-0.5=2 (yuan)

Answer; The unit prices of Chinese books and math books are 2.5 yuan and 2 yuan respectively.

2. It is known that the total price of tables and chairs and the unit price of tables are more expensive than chairs. 3.5 yuan asked for the unit price of the chair, you can think so; Think of the table as a chair.

(14+28)=42, it can be found that 14 desk costs (3.5X 14) yuan more than chair. Then subtract 238-3.5X 14 from the total price, which is the total price of 42 chairs. Unit price of chairs = total price of 42 chairs.

42。 Calculate according to the meaning of the question;

(238-3.5X 14)

( 14+28)

= 189÷

Forty two.

=4.5 (yuan)

Answer; Chair unit price 4.5 yuan.