I'm not given the other 3 numbers. I think I'm misinterpreting what you are saying sum/amount of numbers or sum/each number totaled up. 22/4=5.5 evenly distributed. I'm also running into an issue also one of the numbers doesn't necessarily have to be 8 the 4 numbers average is 8.
oh wait 3 of 4 numbers have a sum of eight. 6,7,, and 9=22 so the 4th number has to be 8. but 22/3=7.3 I mean visually it makes sense but mathematically I'm not getting the answer.
Correct! You could have done it without writing an equation.. if the average of N number is A, the sum of them is NA. The average of 4 number is 8, then the sum of them is 32. .But the sum of three of them is 22, and adding the fourth yields 32...