Resposta:

Olá!

a)

4x + 2 = 38

4x = 38 - 2

4x = 36

x = 36/4

x = 9

b)

9x - 6x = 12

3x = 12

x = 12/3

x = 4

c)

5x - 3x = 11 - 1

2x = 10

x = 10 / 2

x = 5

d)

2x - x = 13 - 8

x = 5

e)

x = 0 - 3

x = -3

f)

23x + 2 = 2

23x = 2 - 2

23x = 0

x = 0/23

x = 0

g)

5 + 4x = 25

4x = 25 - 5

4x = 20

x = 20/4

x = 5

h)

2x = 30

x = 30/2

x = 15

i)

4x + 3x = 45 - 10

7x = 35

x = 35/7

x = 5