Question

The mean of the numbers 6,y,7,x,14 is 8. Express y in terms of x

Answer 1

(6+y+7+x+14)/5 = 8
     6+y+7+x+14 = 40
     27+x+y = 40
     x+y = 40-27
     x+y = 13
     y = 13-x