Д. з. N1 3x+8=0 N2 6-2x = 0 W3 7x-4 = x-16 NY 13-5x=8-200 N5 1,39-11 = 989 +5 N6 071-13 = 10-9292 NI 8c+973 = 4,61-80 N8 8x+5 = 119 +7-3x N9 82+11-13=92-5

N1

3x + 8 = 0

3x = -8

x = -\frac{8}{3}

Ответ: x = -\frac{8}{3}

N2

6 - 2x = 0

-2x = -6

x = \frac{-6}{-2}

Ответ: x = 3

N3

7x - 4 = x - 16

7x - x = -16 + 4

6x = -12

x = \frac{-12}{6}

Ответ: x = -2

N4

13 - 5x = 8 - 2x

-5x + 2x = 8 - 13

-3x = -5

x = \frac{-5}{-3}

Ответ: x = \frac{5}{3}

N5

1.3a - 11 = 0.9a + 5

1.3a - 0.9a = 5 + 11

0.4a = 16

a = \frac{16}{0.4}

a = \frac{160}{4}

Ответ: a = 40

N6

0.7x - 13 = 10 - 9.29x

0.7x + 9.29x = 10 + 13

9.99x = 23

x = \frac{23}{9.99}

Ответ: x = \frac{23}{9.99} ≈ 2.302

N7

8c + 9.73 = 4.61 - 8c

8c + 8c = 4.61 - 9.73

16c = -5.12

c = \frac{-5.12}{16}

Ответ: c = -0.32

N8

8x + 5 = 119 + x - 3x

8x + 5 = 119 - 2x

8x + 2x = 119 - 5

10x = 114

x = \frac{114}{10}

Ответ: x = 11.4

N9

8x + 11 - 13 = 9x - 5

8x - 2 = 9x - 5

8x - 9x = -5 + 2

-x = -3

Ответ: x = 3