Ans: C
$\begin{array}{rcl}
5-3m & = & 2n \\
3m & = & 5-2n \\
m & = & \dfrac{5-2n}{3}
\end{array}$
$\begin{array}{rcl}
5-3m & = & 2n \\
3m & = & 5-2n \\
m & = & \dfrac{5-2n}{3}
\end{array}$
Resources for HKDSE Mathematics
Resources for HKDSE Mathematics
