Finding the largest number if 8 consecutive numbers average X

[xLaser]

If the average of 8 consecutive numbers is X. What is the largest number in terms of X?

I have no idea on how to solve this question. thx.

 

[vincentchan]

let the largest number be n, the rest is n-1,n-2...n-7...the average of these eight number is X... you have 1 equation and two unknow... so you can find n in term of X

 

[Wooh]

the sum of 8 consecutive numbers can be written as such: (n+n+7)8/2 following the whole (n1+nfinal)(total/2) form. Using this, we get that (n+n+7)4/8=x or 2x=2n+7, meaning that n=(2x-7)2

 

[xLaser]

o ok i c, but u must set another variable.