1) 456 + (х - 367) - 225 = 898
456 + (х - 367) = 898 + 225
456 + (х - 367) = 1123
х - 367 = 1123 - 456
х - 367 = 667
х = 667 + 367
х = 1034
2) 142 - (123 - х) + 14 = 111
142 - (123 - х) = 111 - 14
142 - (123 - х) = 97
123 - х = 142 - 97
123 - х = 45
х = 123 - 45
х = 78
1) 456 + (х - 367) - 225 = 898
456 + (х - 367) = 898 + 225
456 + (х - 367) = 1123
х - 367 = 1123 - 456
х - 367 = 667
х = 667 + 367
х = 1034
2) 142 - (123 - х) + 14 = 111
142 - (123 - х) = 111 - 14
142 - (123 - х) = 97
123 - х = 142 - 97
123 - х = 45
х = 123 - 45
х = 78