A bookshelf is 88㎝ wide. There are 90 math books and Chinese books on a certain floor. The math book is 0.8cm, and the Chinese book is 1.2cm. Find out how many books there are and draw a table.
Solution: If there are X math books, there are 90-x Chinese books.
0.8*x+ 1.2*(90-x)=88
-0.4x=-20
x=50
90-50=40 (Ben)
Answer: There are 50 math books and 40 Chinese books.
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