The first method:

Language: (180+6) divided by 2= 186 divided by 2=93 (minutes)

Math: 93-6=87 (score)

The second method:

90 times 2= 180 points,

Mathematics: (180-6) divided by 2= 174 divided by 2=87 (points).

Language: 87+6=93 (minutes)

The third method:

Language: 90+3=93 (minutes)

Math: 90-3=87 (score)

Checking calculation: (93+87) divided by 2= 180 divided by 2=90 (minutes)

Please take mine.