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
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