[tex]\begin{gathered} -6x-2y=12 \\ \text{make y the subject of the formula,} \\ -2y=6x+12 \\ \text{Divide through the the equation by -2 , we get} \\ y=-3x-6\ldots.eqn(1) \\ \end{gathered}[/tex]
The slope of the line is the coefficient of x in eqn(1), which is, - 3.
The solution is -3
