#### Answer

$x=16$

#### Work Step by Step

Using the properties of equality, the solution to the given equation, $
-\dfrac{4}{7}x=-28
$, is
\begin{array}{l}\require{cancel}
x=-28\cdot\left( -\dfrac{4}{7} \right)
\\\\
x=\cancel{7}\cdot(-4)\cdot\left( -\dfrac{4}{\cancel{7}} \right)
\\\\
x=16
.\end{array}