[tex]\begin{gathered} 3\text{ - 2 (9 + }2m)\text{ = m} \\ \text{Expand the bracket, we have:} \\ 3\text{ - 18 - 4m = m} \\ \text{Add '4m' to both sides, we have:} \\ 3\text{ - 18 - 4m + 4m = m + 4m} \\ -15\text{ = 5m} \\ Divide\text{ both sides by 5, we have:} \\ m\text{ = -3} \end{gathered}[/tex]
