Question

СРОЧНО ПОМОГИТЕ РЕШИТЬ

Answer 1

Ответ:

Пошаговое объяснение:

1)

(2+х)/3 = (3х-2)/5

3 * (3х - 2) = 5 * (2 + х)

9х - 6 = 10 + 5х

9х - 5х = 10 + 6

4х = 16

х = 16 : 4

х = 4

2)

х/5 - х/2 = -3 | *10

10х/5 - 10х/2 = 10 * (-3)

2х - 5х = -30

-3х = -30

х = -30 : (-3)

х = 10

3)

(х+9)/3 - (х-1)/5 = 2 | *30

10*(х+9) - 6(х-1) = 60

10х + 90 - 6х + 6 = 60

10х - 6х = 60 - 90 - 6

4х = -36

х = -36 : 4

х = -9

4)

(4х+13)/10 - (5+2х)/4 = (6-7х)/20 - 1 | *20

2(4х+13) - 5(5+2х) = (6-7х) - 20

8х + 26 - 25 - 10х = 6 - 7х - 20

8х - 10х + 7х = 6 - 20 - 26 + 25

5х = -15

х = -15 : 5

х = -3