Question

помогите!!!!!¡!!!!!!!!!!!​

Answer 1

Ответ:

1) -7х = 42

х = 42/-7

х = -6

2) 3/5х = 1

х = (1*5)/3

х = 5/3

3) -х = 3,29

х = 3,29

4) 16х = -2/3

х = -2/(3*16)

х = -2/48

х = -1/24

5) 5х-15 = 0

5х = 15

х = 15/5

х = 3

6) 5х-22 = 2х+14

5х-2х = 14+22

3х = 36

х = 36/3

х = 12

7) 3-5(х+1) = 6-4х

3-5х-5 = 6-4х

-5х+4х = 6-3+5

-х = 8

х = -8

8) х/3 + х/12 = 15/4

4х/12 + х/12 = 45/12

4х+х = 45

5х = 45

х = 9

9) 3х-5/7 + 2х+1/14 = 2х-3/2

2*(3х-5)/14 + 2х+1/14 = 7*(2х-3)/14

6х-10 + 2х+1 = 14х-21

6х+2х-14х = -21+10-1

-6х = -12

х = -12/-6

х = 2