Fie a numărul căutat.
[tex] \frac{a + ( - \frac{3}{2} )}{2} = - \frac{3}{8} [/tex]
[tex]a + ( - \frac{3}{2} ) = - \frac{3}{8} \times 2[/tex]
[tex]a - \frac{3}{2} = - \frac{3}{4} [/tex]
[tex]a = - \frac{3}{4} + \frac{3}{2} [/tex]
[tex]a = - \frac{3}{4} + \frac{6}{4} [/tex]
[tex]a = \frac{3}{4} [/tex]