Answer :

mariamikayla
3 [ (20-4) / 2 ]= 3 * 16/2=  3 x 8 =24

5,(9)=5 9/9= 54/9=6

6/8/4= 6/2=3
biya
3[(20-4)/2]
=3[16/2]
=3(8)
=24
and
5(9)/(8/4)
=45/2
=22.5 is answer