Answer:
f-9=12 Answer=20
24=g+14 Answer=10
Explanation:
take the numbers you already have, let's start with the first equation:
f-9=12
find out what they are when you put them together
12+9=f
f=20
Second equation:
24=g+14
do the same, except subtract this time
24-14=g
g=10
Hope this helps (: