A) 3(x ^ 3 - 1) = - 27 b) 3(x - 1) + 2 = - 4x - 1 c) 1 / 3 x - 1 = 2(1 / 3 x + 1 / 5)?

A)

3(x³ - 1) = - 27

x³ - 1 = - 27 / 3

x³ = - 9 + 1

x³ = - 8

x = ³√ - 8

x = - 2

b)

3(x - 1) + 2 = - 4x - 1

3x - 3 + 2 = - 4x - 1

7x = - 1 + 1

7x = 0

x = 0

c)

1 / 3 x - 1 = 2(1 / 3 x + 1 / 5)

x / 3 - 1 = 2x / 3 + 2 / 5 (multiplicamos todo por 15

5x - 15 = 10x + 6

5x = - 21

x = - 21 / 5

saludos Ariel.