Question

помогите срочнодам 20​

Answer 1

Ответ:

Пошаговое объяснение:

(3x + 5) + (8x + 1) = 17

3x + 5 + 8x + 1 = 17

11x + 6 = 17

11x = 17 - 6

11x = 11

x = 1

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19 - 5(3x - 1) = 9

19 - 15x + 5 = 9

24 - 15x = 9

15x = 24 - 9

15x = 15

x = 1

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(3 - 5,8x) - (2,2x + 3) = 16

3 - 5,8x - 2,2x - 3 = 16

-8x = 16

x = -16:8

x = -2

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21 = -20 - 8(2x - 0,5)

21 = -20 - 16x + 4

21 = -16 - 16x

16x = -16 - 21

16x = -37

x = -37:16

x = -2,3125

======================

30+5(3x - 1) = 35x - 25

30 + 15x - 5 = 35x - 25

25 + 15x = 35x - 25

35x - 15x = 25 + 25

20x = 50

x = 50 : 20

x = 2,5

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10x - 5 = 6(8x + 3) - 5x

10x - 5 = 48x + 18 - 5x

10x - 5 = 43x + 18

43x - 10x = -5 - 18

33x = -23

x = -23:33

x = -23/33

=====================

-10(3 - 4x) + 51 =  7(5x + 3)

-30 + 40x + 51 = 35x + 21

21 + 40x = 35x + 21

40x - 35x = 21 - 21

5x = 0

x = 0

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6x - 5(3x + 2) = 5(x - 1) - 8

6x - 15x - 10 = 5x - 5 - 8

-9x - 10 = 5x - 13

5x + 9x = 13 - 10

14x = 3

x = 3/14