According to the way I learned it, you would add 9 since you are subtracting it and since it is subtracted, it would be considered a negative number so it would cancel out if you add 9. You would also add 9 to -93 which would give you -84. Bring it down and it will become -7x=-84. Divide both sides by -7, canceling out -7, and -84 divided by -7 is 12. Since they are both negative, you make it positive according to integer rules and therefore, x=12.
The median is the middle number when you arrange the data in ascending order. The mean is all the data added up and divided by the number of data points, which is 8. The mean was 13.25, but rounded to the nearest 10th is 13.3.
