10(2x+2)+ 18x=468.4

38x=448.4

x= 1 1.8

A: Literature and Art Book 1 1.8 yuan Science and Technology Book 1 1.8*2+2=25.6 yuan.

A primary school library bought 10 science and technology books and 18 art books, which cost 468.4 yuan. If you trade 1 for two literary books, you should be able to get 2 yuan money back. The unit price of science and technology books is (25.6), and that of literature and art books is (1 1.8).