Ответ:

Пошаговое объяснение:

2)

1 - (5х-2)/6 = (х-5)/9 | *36

1*36 - 6(5х-2) = 4(х-5)

36 - 30х + 12 = 4х - 20

-30х - 4х = -20 - 36 - 12

-34х = -68

х = -68 : (-34)

х = 2

3)

(3х+4)/5 + (х-7)/2 = 2(2х+3)/5 | *10

2(3х+4) + 5(х-7) = 2*2(2х+3)

2(3х + 4) + 5(х - 7) = 4(2х + 3)

6х + 8 + 5х - 35 = 8х + 12

6х + 5х - 8х = 12 - 8 + 35

3х = 39

х = 39 : 3

х = 13

4)

(7х-3)/2 - (9-4х)/3 = (7-х)/2 | *6

3(7х-3) - 2(9-4х) = 3(7-х)

21х - 9 - 18 + 8х = 21 - 3х

21х + 8х + 3х = 21 + 9 + 18

32х = 48

х = 48/32

х = 3/2

х = 1,5