Chen Jun, a math teacher.

The sum of five subjects is 89*5=445, the sum of politics and mathematics is 9 1.5*2= 183, the sum of Chinese and English is 84*2= 168, the sum of politics and English is 86*2= 172, and the biological score is 42.

Language =( 168- 10)/2=79, English =79+ 10=89, politics = 172-89=83, mathematics =183-.

So:

Chinese 79

English 89

Politics 83

Mathematics 100

Biology 94

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