№8 Уравнения 1)x=-3 9)-x=-4 на умножение 2)x=3 10)-x=-21 обыкновен- ных дробей 3) -14х=3 11)x=7 4) x=-2 12)-x=4 5)-x=5 13)x=-6 6)-x=-4 14)-x=10 7)x=-6 15)x=-7 8)-x=-2 16)-x=8

Ответ:

Решим уравнения:

1. \[\frac{1}{2}x = -3\]

   \[x = -3 \cdot 2\]

   \[\mathbf{x = -6}\]

2. \[\frac{1}{3}x = 3\]

   \[x = 3 \cdot 3\]

   \[\mathbf{x = 9}\]

3. \[-\frac{1}{4}x = 3\]

   \[x = 3 \cdot (-4)\]

   \[\mathbf{x = -12}\]

4. \[\frac{1}{5}x = -2\]

   \[x = -2 \cdot 5\]

   \[\mathbf{x = -10}\]

5. \[-\frac{1}{3}x = 5\]

   \[x = 5 \cdot (-3)\]

   \[\mathbf{x = -15}\]

6. \[-\frac{1}{4}x = -4\]

   \[x = -4 \cdot (-4)\]

   \[\mathbf{x = 16}\]

7. \[\frac{1}{3}x = -6\]

   \[x = -6 \cdot 3\]

   \[\mathbf{x = -18}\]

8. \[-\frac{1}{9}x = -2\]

   \[x = -2 \cdot (-9)\]

   \[\mathbf{x = 18}\]

9. \[-\frac{1}{5}x = -4\]

   \[x = -4 \cdot (-5)\]

   \[\mathbf{x = 20}\]

10. \[-\frac{1}{7}x = -21\]

    \[x = -21 \cdot (-7)\]

    \[\mathbf{x = 147}\]

11. \[\frac{1}{3}x = 7\]

    \[x = 7 \cdot 3\]

    \[\mathbf{x = 21}\]

12. \[-\frac{1}{6}x = 4\]

    \[x = 4 \cdot (-6)\]

    \[\mathbf{x = -24}\]

13. \[\frac{1}{6}x = -6\]

    \[x = -6 \cdot 6\]

    \[\mathbf{x = -36}\]

14. \[-\frac{1}{4}x = 10\]

    \[x = 10 \cdot (-4)\]

    \[\mathbf{x = -40}\]

15. \[\frac{1}{7}x = -7\]

    \[x = -7 \cdot 7\]

    \[\mathbf{x = -49}\]

16. \[-\frac{1}{7}x = 8\]

    \[x = 8 \cdot (-7)\]

    \[\mathbf{x = -56}\]

Ответ: