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Xiaoming mid-term exam Chinese, mathematics and English
Let's say the language is X: then the math is 87*2-x, and then the English is 90*2-(87*2-x).

The last common sense is: 88*2-90*2-(87*2-x)

From the last condition (the score of common sense is known to be higher than that of Chinese 10), 88*2-90*2-(87*2-x)-x= 10.

The solution of this one-dimensional linear equation is: x=80.

So the math is: 94.

Language: 80

English is: 86

Common sense: 90

Total score: 350, average score 87.5.

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