It is given that

AX = B

Where

A = and B =

And we have to find the value of n.

AX =

or, AX =

Thus,

On comparing both sides we get,

2n+4 = 8 ……………...(i)

4n+3 = 11 ……………...(ii)

From (i),

2n = 4

n = 2

and from (ii) ,

4n = 8

n = 2

Hence