1. \( 61 - x = 36 \)
\( x = 61 - 36 \)
\( x = 25 \)
2. \( x + 65 = 92 \)
\( x = 92 - 65 \)
\( x = 27 \)
3. \( x - 17 = 53 \)
\( x = 53 + 17 \)
\( x = 70 \)
4. \( x : 6 = 3 \)
\( x = 3 \cdot 6 \)
\( x = 18 \)
Ответ: x = 25; x = 27; x = 70; x = 18.