Х + (6534+241)=(4173+6534)+241
Х * (25*37)=(42*25)*37
Х + 25689=25689+37541
6598*Х=2379*6598
Х * (25*37)=(42*25)*37
Х + 25689=25689+37541
6598*Х=2379*6598
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х+6775=10707+241
х+6775=10948
х=10948-6775=4173
Проверка:
4173+(6534+241)=(471+6534)+241
4173+6775=10707+241
10948=10948
Х * (25*37)=(42*25)*37
925х=38850
х=38850:925
х=42
проверка:
42 * (25*37)=(42*25)*37
38850=38850
Х + 25689=25689+37541
Х + 25689=63230
х=63230-25689
х=37541
проверка:37541+25689=63230
6598*Х=2379*6598
6598х=15696642
х=15696642:6598
х=2379
проверка: 6598*2379=15696642