Answer :
Given the equation :
[tex]-6d=-42[/tex]So, to find d , divide both sides by ( -6 )
So,
[tex]\begin{gathered} \frac{-6d}{-6}=\frac{-42}{-6} \\ \\ d=7 \end{gathered}[/tex]Note: when we divide two negative numbers, the result will be a positive number