25 - (х+9) : 5  = 19

х + 9 = 19*5+25

х + 9 = 120

х = 120 - 9

х = 111

540 : (4*х-2) = 30

4*х-2 = 540 : 30

4*х - 2 = 18

4*х= 18 +2

4*х = 20

х = 20: 4

х = 5