Question

The set of possible values of m is {5,7,9}. What is the set of possible values of k if 2k=m+3?

Answer 1

Just plug in the values for m

so the possible values for k are
when m=5
$2k=5+3 \\ k=4$
when m=7
$2k=7+3 \\ k=5$
when m=9
$2k=9+3 \\ k=6$
so the possible values for k are {4,5,6}