Answer:

Explanation:
Given
Set 1: (9,5,y,2,x)
Set 2: (8,x,4,1,3)
Required
(y - x)
First the mean values of set 1 and set 2 has to be calculated
For set 1

Collect like terms


For set 2

Collect like terms


Given that the mean of set 1 is twice the mean of set 2;


Multiply both sided by 5


Open bracket

Subtract 16 from both sides



Subtract 2x from both sides

