If 2x, x + 4 and x + 1 are in A.P., then the value of x is:

In an A.P. difference between two consecutive term is same.

Difference = ( 2nd term - 1st term ) = ( 3rd term - 2nd term )

( x + 4 ) − 2x = ( x + 1 ) − ( x + 4 )

x + 4 − 2x = x + 1− x − 4

4−x = −3

$x=7$

So, the value of x is 7