2019-I-02

Ans: $\dfrac{x}{(7x-6)(5x-4)}$
$\begin{array}{cl}
& \dfrac{3}{7x – 6} – \dfrac{2}{5x – 4} \\
= & \dfrac{3(5x-4)}{(7x – 6)(5x – 4)} – \dfrac{2(7x – 6)}{(7x – 6)(5x – 4)} \\
= & \dfrac{3(5x – 4) – 2(7x – 6)}{(7x – 6)(5x – 4)} \\
= & \dfrac{15x – 12 – 14x + 12}{(7x – 6)(5x – 4)} \\
= & \dfrac{x}{(7x – 6)(5x – 4)}
\end{array}$