26
Step-by-step explanation:
The Mean is the average of the set of student words. It is calculated by dividing the sum of words by the number of students
Sum of words = (28 + 26 +24) = 78
Number of students = 3
The mean: 78 /3 = 26
-2x + 7 = 7
subtract 7 from both sides.
-2x = 0
divide both sides by -2.
x = 0