[tex]so \: first \: subtract \: m \: from \: 8 \: \\ (8 - m) \\ then \: add \: 4 \\ (8 - m) + 4 \\ if \: there \: is \: value \: of \ m \: then \: you \: can \: put \: it in \: the \: expression \: and \: solve \: it \: \\ or \: \\ can \: give \: me \: so \: i \: can \: solve \: it[/tex]
