209. Решите уравнение:

Решение:

1. \( x + 5,74 = 9 \)
   \( x = 9 - 5,74 \)
   \( x = 3,26 \)
2. \( 5,4 - x = 3,827 \)
   \( x = 5,4 - 3,827 \)
   \( x = 1,573 \)
3. \( x - 5,257 = 19,743 \)
   \( x = 19,743 + 5,257 \)
   \( x = 25 \)
4. \( (29,3 - x) + 54 = 69,351 \)
   \( 29,3 - x = 69,351 - 54 \)
   \( 29,3 - x = 15,351 \)
   \( x = 29,3 - 15,351 \)
   \( x = 13,949 \)

Ответ: 1) 3,26; 2) 1,573; 3) 25; 4) 13,949.