Find the value of $m+9$m+9 when $m=3$m=3.

Find the value of $9+m$9+m when $m=3$m=3.

Find the value of $x-2$x−2 when $x=8$x=8.

Find the value of $8-c$8−c when $c=1$c=1.

Generalise the properties of operations with fractional numbers and integers.