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Mathematics synchronous exercise fourth grade
An exercise book is X yuan and a notebook is 3x yuan.

The price of 4 notebooks is 4 times 3x.

The price of 8 exercise books is 8 times x.

Therefore, the equation can be listed as follows:

8x+ 12x=20

The solution is x= 1.

Then 3x=3.

Answer: The unit price of exercise book is 1 yuan, and the unit price of notebook is 3 yuan.

Hope to adopt.

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