1) (118-x) + 234 = 31118 - x + 234 = 31352 - x = 31-x = 312 - 35-x = -4x = 40
2) 412 - (x - 12) = 37412 - x + 12 = 37424 - x = 37-x = 376 - 42-x = -4x = 48
Ответ: x = 40 и x = 48.
1) (118-x) + 234 = 31
118 - x + 234 = 31
352 - x = 31
-x = 312 - 35
-x = -4
x = 40
2) 412 - (x - 12) = 37
412 - x + 12 = 37
424 - x = 37
-x = 376 - 42
-x = -4
x = 48
Ответ: x = 40 и x = 48.