1. Your school receives a ranking depending on the overall average of all students in the school. Suppose the school wants an overall average of 90%. The following data represent the averages of 8 other classrooms. What grade would the 9^th classroom need in order for the average among all classes to be at least a 90%?

Class 1	Class 2	Class 3	Class 4	Class 5	Class 6	Class 7	YOUR CLASS	Class 9
93	80	70	86	68	92	74	82	X

The formula for solving this question is below. Replace the words, "Your Class Average," with the answer you found in question 5 and solve for X. Show each step of your work.