Answer
$\dfrac{x+1}{x+2}=\dfrac{6}{12-x}$
Work Step by Step
In order to get the solution we will have to simplify the given expression as a rational by considering the value of $5$.
Thus,
$\frac{5+1}{5+2}=\frac{6}{12-5}$
Now put $x$ instead of $5$ in above equation.
Therefore,
$\dfrac{x+1}{x+2}=\dfrac{6}{12-x}$