Verified answer

(x-12)*8=56

x-12=56:8

x-12=7

x=7+12

x=19

24*(x+9)=288

x+9=288:24

x+9=12

x=12-9

x=3

(y+25):8=16

y+25=16*8

y+25=128

y=128-25

y=103

124:(y-5)=31

y-5=124:31

y-5=4

y=4+5

y=9

38x+15=91

38x=91-15

38x=76

x=76:38

x=2

44:z+9=20

44:z=20-9

44:z=11

z=44:11

z=4