Given X=..., expressing a given in X terms in terms of a.

if X=(2a+3)/((3a-2)

express (X-1)/(2X+1) in terms of a.

Solution

here all they want us to do is to substitute the value of X in the expression given and do the little algebra in there.
our final expression the question wants us to arrive at will be (a+6)/(7a+4)

and this is in terms of a as required.