For $\dfrac{x + 0.5}{6x - 1} = \dfrac{1}{2}$ , the value of x is:

1. $\dfrac{1}{2}$

2. $-\dfrac{1}{2}$

3. 2

4. -2

For 7x - 8 = 5x + 2, the value of x is:

1. $\dfrac{5}{6}$

2. $\dfrac{6}{5}$

3. 5

4. 8

For $\dfrac{5}{x} = \dfrac{7}{x - 4}$, the value of x is:

1. -10

2. 10

3. 5

4. -5

If $\dfrac{x - 2}{4} - \dfrac{x - 3}{5} = 1$, the value of x is:

1. -42

2. 42

3. -18

4. 18