Question

помогите плиз срочно пжжжжжжжжжжж​

Answer 1

4.3

а) 7x + 9 = 100

7x = 100 - 9

7x = 91

x = 91 / 7

x = 13

б) 26x - 0,8 = 7

26x = 7 + 0,8

26x = 7,8

x = 7,8 / 26

x = 0,3

в) 1/2 · x - 1/3 = 1/6 | · 6

3x - 2 = 1

3x = 1 + 2

3x = 3

x = 3 / 3

x = 1

г) 17,5x - 0,5 = 34,5

17,5x = 34,5 + 0,5

17,5x = 35

x = 35 / 17,5

x = 2

4.4

а) 9 + 13x = 35 + 26x

13x - 26x = 35 - 9

- 13x = 26

x = - 26 / 13

x = - 2

б) 7/9 · x + 3 = 2/3 · x + 5 | · 9

7x + 27 = 6x + 45

7x - 6x = 45 - 27

x = 18

в) 0,81x - 71 = 1,11x + 1

0,81x - 1,11x = 1 + 71

- 0,3x = 72

x = - 72 / 0,3

x = - 240

г) 1/3 · y - 4 = 1/4 · y - 5 | · 12

4y - 48 = 3y - 60

4y - 3y = - 60 + 48

x = - 12