Total score of Chinese and mathematics: 83×6-85-90-75-80,

=498-85-90-75-80,

= 168 (minutes),

Because the number of units in math is 5, the number of units in Chinese must be 8-5=3.

Chinese 83 points, math 168-83=85 (points);

A: 83 points for Chinese and 85 points for mathematics.