1) (118-x) + 234 = 312118 - x + 234 = 312352 - x = 312-x = 312 - 352-x = -40x = 40
2) 412 - (x - 12) = 376412 - x + 12 = 376424 - x = 376-x = 376 - 424-x = -48x = 48
Ответ: x = 40 и x = 48.
1) (118-x) + 234 = 312
118 - x + 234 = 312
352 - x = 312
-x = 312 - 352
-x = -40
x = 40
2) 412 - (x - 12) = 376
412 - x + 12 = 376
424 - x = 376
-x = 376 - 424
-x = -48
x = 48
Ответ: x = 40 и x = 48.