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The answer to the third question on page 17 of the second volume of the fifth grade mathematics exercise book is Hebei Education Edition.
Solution: Assume that each "story king" is X yuan. If the answer is 1.6.

4 times1.6+4x = 20-7.61.6 times 4=6.4.

6.4+4X= 12.4 1.6 times 4=6.4.

4X = 12.4—6.4 6.4+6.4 = 12.8

4X=6 20— 12.8=7.2

X=6 divided by 4 7.2 is not equal to 7.6.

X= 1.5, so your teacher made a mistake.

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