Answer :
To know the denominator of the division you have to perform the oposite mathematical operation.
[tex]\begin{gathered} \frac{-38}{x}=19 \\ \text{Then} \\ -38=19x \\ x=\frac{-38}{19} \\ x=\text{ }-2 \end{gathered}[/tex]-38 divided by -2 equals 19