If the mean of (X - 5Y), (X - 3Y), (X + Y),(X + 3Y) and (X + 5Y) is 12...now find the value of X..?

If the mean of (X - 5Y), (X - 3Y), (X + Y),(X + 3Y) and (X + 5Y) is 12

1.	If the mean of (X - 5Y), (X - 3Y), (X + Y),(X + 3Y) and (X + 5Y) is 12...now find the value of X..?
Answer» Mean = (X - 5Y + X - 3Y + X + Y + X + 3Y + X + 5Y) / 5 = X + X + X + X + X + Y /5 = 12.5X + Y / 5 = 12. 5X + Y = 60.5X = 60 - Y.X = 60 - Y / 5//.