SOLUTION:
(i)
[tex]\begin{gathered} \text{12x = -36} \\ \frac{12x}{12}=\frac{-36}{12} \\ \\ x\text{ = -3} \end{gathered}[/tex](ii)
[tex]\begin{gathered} -2x\text{ = -14} \\ \frac{-2x}{-2}\text{ = }\frac{-14}{-2} \\ \\ x\text{ = 7} \end{gathered}[/tex](iii)
[tex]\begin{gathered} \frac{x}{-3}=\text{ 9} \\ \\ x\text{ = -3 X 9} \\ x\text{ = -27} \end{gathered}[/tex](iv)
[tex]\begin{gathered} \frac{5}{x}=\text{ 10} \\ \\ \frac{5}{x}=\frac{10}{1} \\ \\ 10x\text{ = 5} \\ \frac{10x}{10}=\frac{5}{10} \\ \\ x\text{ = }\frac{1}{2} \end{gathered}[/tex]