Решение:
- \( 3x - 5 = 4x + 4 \)
\( 3x - 4x = 4 + 5 \)
\( -x = 9 \)
\( x = -9 \)
- \( 3x = 0 \)
\( x = \frac{0}{3} \)
\( x = 0 \)
- \( 6x = 2 \)
\( x = \frac{2}{6} \)
\( x = \frac{1}{3} \)
- \( 2(x + 5) = 0 \)
\( 2x + 10 = 0 \)
\( 2x = -10 \)
\( x = -5 \)
- \( 8 - 6 = 9x - 5x \)
\( 2 = 4x \)
\( x = \frac{2}{4} \)
\( x = 0,5 \)
- \( -0,3x = 2,7 \)
\( x = \frac{2,7}{-0,3} \)
\( x = -9 \)
- \( -1 = -10(x - 2) \)
\( -1 = -10x + 20 \)
\( 10x = 20 + 1 \)
\( 10x = 21 \)
\( x = 2,1 \)
- \( 5x + 2 = 10x - 18 \)
\( 5x - 10x = -18 - 2 \)
\( -5x = -20 \)
\( x = 4 \)
Сопоставление с ответами:
1. \( x = -9 \) - Ответ. - 9.
2. \( x = 0 \) - Ответ. 0.
3. \( x = \frac{1}{3} \) - Ответ. 1/3.
4. \( x = -5 \) - Ответ. - 5.
5. \( x = 0,5 \) - Ответ. 0,5.
6. \( x = -9 \) - Ответ. - 9.
7. \( x = 2,1 \) - Ответ. 2,1
8. \( x = 4 \) - Ответ. 4.