127-76=,, (51)
340-283=,, (57)
700-612=,, (88)
400-367=,, (33)
1/7 +х= - 3/7
х= - 3/7 - 1/7
х= - 4/7
Х-2208:32=8090
х-69=8090
х=8090+69
х=8159
проверка
8159-2208:32=8090
8159-69=8090
8090=8090
67хХ-10986=21777
67хХ=21777+10986
67хХ=32763
Х=32763:67
Х=489
проверка
67х489-10986=21777
32763-10986=21777
21777=21777