[tex] \bf \large \longrightarrow \: 3m \: + \: 18 \: + \: 2m \: = \: 40[/tex]
[tex] \bf \large \longrightarrow \:5m \: + \: 18 \: = \: 40[/tex]
[tex] \bf \large \longrightarrow \:5m \: = \: 40 \: - \: 18[/tex]
[tex] \bf \large \longrightarrow \:5m \: = \: 22[/tex]
[tex] \bf \large \longrightarrow \:m \: = \: \frac{22}{5} \\ [/tex]
[tex] \bf \large \longrightarrow \:m \: = \: \cancel\frac{22}{5} \: \: ^{4.4} \\ [/tex]
[tex] \bf \large \longrightarrow \:m \: = \: 4.4[/tex]
