ТРЕНАЖЕР ПО ТЕМЕ « + и числа» №6 Уравнения 1)-2-x=2 10)-8x=4 на 2)5x=-5 11)6x=-3 умножение 3)x(-5)=5 12)-4x=2 целых чисел 4)x(-4)=8 13)-2x=-1 5)-10x=20 14)20x=-4 6)7x=-14 15)-3x=1 7)x(-3)=6 16)9x=-3 8)-3x=18 17)x-(-5)=-2 9)x-2=-18 18)-5x=1 №7 Уравнения 1)-0,6x=1,2 7)-0,9x=-9 на 2)-0,5x=-1 8)0,7x=14 умножение 3)-0,4x=2 9)-0,2x=5 десятичных 4)-0,8x=-4 дробей. 10)-0,1x=-3 5)-0,2x=2 11) 0,1x=-5 6)-0,3x=-3 12) 0,01x=-2 №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: См. решение ниже

№6 Уравнения на умножение целых чисел

1. -2x = 2

   x = 2 / -2

   x = -1

2. 5x = -5

   x = -5 / 5

   x = -1

3. x * (-5) = 5

   x = 5 / -5

   x = -1

4. x * (-4) = 8

   x = 8 / -4

   x = -2

5. -10x = 20

   x = 20 / -10

   x = -2

6. 7x = -14

   x = -14 / 7

   x = -2

7. x * (-3) = 6

   x = 6 / -3

   x = -2

8. -3x = 18

   x = 18 / -3

   x = -6

9. x * 2 = -18

   x = -18 / 2

   x = -9

10. -8x = 4

    x = 4 / -8

    x = -0.5

11. 6x = -3

    x = -3 / 6

    x = -0.5

12. -4x = 2

    x = 2 / -4

    x = -0.5

13. -2x = -1

    x = -1 / -2

    x = 0.5

14. 20x = -4

    x = -4 / 20

    x = -0.2

15. -3x = 1

    x = 1 / -3

    x = -1/3

16. 9x = -3

    x = -3 / 9

    x = -1/3

17. x * (-5) = -2

    x = -2 / -5

    x = 0.4

18. -5x = 1

    x = 1 / -5

    x = -0.2

№7 Уравнения на умножение десятичных дробей

1. -0.6x = 1.2

   x = 1.2 / -0.6

   x = -2

2. -0.5x = -1

   x = -1 / -0.5

   x = 2

3. -0.4x = 2

   x = 2 / -0.4

   x = -5

4. -0.8x = -4

   x = -4 / -0.8

   x = 5

5. -0.2x = 2

   x = 2 / -0.2

   x = -10

6. -0.3x = -3

   x = -3 / -0.3

   x = 10

7. -0.9x = -9

   x = -9 / -0.9

   x = 10

8. 0.7x = 14

   x = 14 / 0.7

   x = 20

9. -0.2x = 5

   x = 5 / -0.2

   x = -25

10. -0.1x = -3

    x = -3 / -0.1

    x = 30

11. 0.1x = -5

    x = -5 / 0.1

    x = -50

12. 0.01x = -2

    x = -2 / 0.01

    x = -200

№8 Уравнения на умножение обыкновенных дробей

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

   \[x = -3 \cdot 2\]

   x = -6

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

   \[x = 3 \cdot 3\]

   x = 9

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

   \[x = 3 \cdot -4\]

   x = -12

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

   \[x = -2 \cdot 5\]

   x = -10

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

   \[x = 5 \cdot -3\]

   x = -15

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

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

   x = 16

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

   \[x = -6 \cdot 3\]

   x = -18

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

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

   x = 18

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

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

   x = 20

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

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

    x = 147

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

    \[x = 7 \cdot 3\]

    x = 21

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

    \[x = 4 \cdot -6\]

    x = -24

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

    \[x = -6 \cdot 6\]

    x = -36

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

    \[x = 10 \cdot -4\]

    x = -40

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

    \[x = -7 \cdot 7\]

    x = -49

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

    \[x = 8 \cdot -7\]

    x = -56

Ответ: См. решение выше