Vrednost leve strani: $-1-9=-10$. Vrednost desne strani: $-10$.

Ker sta vrednosti leve in desne strani enaki, je število $-1$ rešitev enačbe.

$x-(-\displaystyle{\frac{3}{4}})= -\displaystyle{\frac{2}{5}}$

Enačbo lahko rešimo z diagramom:

$x-(-\displaystyle{\frac{3}{4}})= -\displaystyle{\frac{2}{5}}$
$x= -\displaystyle{\frac{2}{5}}+(-\displaystyle{\frac{3}{4}})$
$x= -\displaystyle{\frac{8}{20}}-\displaystyle{\frac{15}{20}}$
$x= -\displaystyle{\frac{23}{20}}$
$x= -1\displaystyle{\frac{3}{20}}$

$\mathcal{R}=\{-1\displaystyle{\frac{3}{20}}\}$

Enačbo lahko rešiš tudi tako.

$x-(-\displaystyle{\frac{3}{4}})= -\displaystyle{\frac{2}{5}}$
$x+ \displaystyle{\frac{3}{4}}= -\displaystyle{\frac{2}{5}}$
$x= -\displaystyle{\frac{2}{5}}-\displaystyle{\frac{3}{4}}$
$x= -\displaystyle{\frac{8}{20}}-\displaystyle{\frac{15}{20}}$
$x= -\displaystyle{\frac{23}{20}}$
$x= -1\displaystyle{\frac{3}{20}}$

$\mathcal{R}=\{-1\displaystyle{\frac{3}{20}}\}$