Li Hua and Wang Jun went to buy greeting cards. Wang Jun bought 2.5 times as many as Li Hua. After Li Hua bought another 15, they now have the same number of cards. How many cards did they each buy? (solved by equation)

Suppose Li Hua bought x pieces, then Wang Jun bought 2.5x pieces. According to the meaning of the question, we can get the equation: 2.5x-x = 15, & nbsp; & nbsp; 1.5x = 15, & nbsp; & nbsp; & nbsp; & nbsp; X = 10, then Wang Jun bought 10 × 2.5 = 25 pieces. A: Wang Jun bought 25 pieces, Li Hua bought 10 pieces

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