The average (arithmetic mean) of four numbers is 7x + 6. If one of the numbers is x, what is the average of the other three numbers?	Choose the correct choice from the following answers
A) 9x + 8	B) 3x + 3	C) 5x + 1	D) 5x + 4	E) 15x + 12
If the average of four numbers is 7x + 3, then the sum of all four numbers if 4 * (7x + 6) = 28x + 24. If one of the numbers is x, then the average of the remaining three numbers would be: (28x + 24 - x)/3 = (27x + 24)/3 = 9x + 8.   9x + 8nswer is 9x + 8.
<result>A</result>
The average (arithmetic mean) of four numbers is 7x + 6. If one of the numbers is x, what is the average of the other three numbers?