juniorotabekpai8do

24 - x = 15
х=24-15
х=9

13 + x = 37
х=37-13
х=24

x - 56 = 41
х=56+41
х=97

x - 391 = 9x
8х=-391
х=-391/8=-48 7/8

152 + x = 257
х=257-152
х=105

392 - x = 22
х=392-22
х=370

517 - x = 420
х=517-420
х=97