What number should be addede to
to get
?
Suppose x be the rational number to be added to 
to get 
Then,
+ x = 
= 
-
x = 
x = 
x = 
Therefore,
The required number x = 
9
What number should be addede to to get?
Suppose x be the rational number to be added to to get
Then,
+ x =
= -
x =
x =
x =
Therefore,
The required number x =