Verified Answer :

k/2+9=30
-9 -9
k/2=21
2 2
k=42

Neuron

If you would like to solve the equation k / 2 + 9 = 30, you can calculate this using the following steps:

k / 2 + 9 = 30
k / 2 = 30 - 9 
k / 2 = 21     /2
k = 21
2
k = 42

The result is 42.