# How do you multiply and simplify \frac { 6} { 7x - 42} \cdot \frac { x - 6} { 3x }?

$2 / 7 x$ is the required answer.
We have, $\frac{6}{7 x - 42} \times \frac{x - 6}{3 x}$
$\frac{3 \times 2}{7 \left(x - 6\right)} \times \frac{x - 6}{3 x}$
$\frac{2}{7 x}$