Tengo que hallar el valor de la incógnita de los siguientes cálculos =3 / 4?

3 / 4.

(x + 1 / 2) = 1

3x / 4 + 3 / 8 = 1

(6x + 3) / 8 = 1

6x + 3 = 8

6x = 8 - 3

6x = 5

x = 5 / 6

2x + 1 / 4 = 1 / 2x + 1

(8x + 1) / 4 = (x + 2) / 2

(8x + 1) / 2 = (x + 2)

8x + 1 = (x + 2)2

8x + 1 = 2x + 4

8x - 2x = 4 - 1

6x = 3

x = 3 / 6

x = 1 / 3

(x - 1 / 4) : 2 = 1

(4x - 1) / 8 = 1

4x - 1 = 8

4x = 8 + 1

4x = 9

x = 9 / 4

1 / 3x + 2 / 15 = 2 / 5

5x / 15 + 2 / 15 = 6 / 15

5x + 2 = 6

5x = 6 - 2

5x = 4

x = 4 / 5.