Current location - Training Enrollment Network - Mathematics courses - Li Ming repurchased 65,438+000 copies of 8-corner exercise books and 4-corner exercise books and paid RMB 68 yuan. How many 8-corner exercise books and 4-corner exercise books did Li Ming buy back?
Li Ming repurchased 65,438+000 copies of 8-corner exercise books and 4-corner exercise books and paid RMB 68 yuan. How many 8-corner exercise books and 4-corner exercise books did Li Ming buy back?
Suppose they are all 8-angle exercise books.

68 yuan =680 angle 8* 100=800 (angle) 800-680= 120 (angle) 120/(8-4)

= 120/4

=30 (Ben) 100-30=70 (Ben)

Li Ming bought 70 8-jiao exercise books and 30 4-jiao exercise books.

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