\(1200:24-\left(17-m\right)=\frac{72}{2}\)
\(\Rightarrow50-\left(17-m\right)=36\)
\(\Rightarrow17-m=50-36\)
\(\Rightarrow17-m=14\)
\(\Rightarrow m=17-14\)
\(\Rightarrow m=3\)
\(9\times\left(m+5\right)=1458:2\)
\(\Rightarrow9\times\left(m+5\right)=729\)
\(\Rightarrow m+5=729:9\)
\(\Rightarrow m+5=81\)
\(\Rightarrow m=81-5\)
\(\Rightarrow m=76\)