Unit price of literary books

1000x4÷500=8 yuan

Unit price of popular science books

4+8= 12 yuan

10000-550x8=5600

5600÷ 12=466……8

You can also buy up to 466 popular science books.

(1) Solution: Let the unit price of literary books be X yuan.

1500x= 1000(x+4)

1500x= 1000x+4000

500x=4000

X=8 yuan

Unit price of popular science books x+4=8+4= 12 yuan.

(2)

10000-550x8=5600

5600÷ 12=466……8

A: The unit price of literature books is 8 yuan, and that of popular science books is 12 yuan. You can buy up to 466 popular science books.