(х - 12)* 8 = 56 24(х+9) = 288
8х - 96 = 56 24х + 216 = 288
8х = 56 + 96 24х = 288 - 216
8х = 152 24х= 72
х = 152 : 8 х = 72 : 24
х = 19 х = 3
(х+25) : 8 = 4 124 : (х-5) = 31
х + 25 = 4 * 8 х - 5 = 124 : 31
х+25 = 32 х - 5 = 4
х = 32 - 25 х = 4 + 5
х = 7 х = 9
38х + 15 = 91 44 : х + 9 = 20
38х = 91 - 15 44 : х = 20 - 9
38х = 76 44 : х = 11
х =76 : 38 х = 44 : 11
х = 2 х = 4
12 - 4х = 8 58 + 2х = 78
4х = 12 - 8 2х = 78 - 58
4х = 4 2х = 20
х = 4 : 4 х = 20 : 2
х = 1 х = 10