$$\frac{ 8 }{ 5 } -2(- \frac{ 6 }{ 5 } )=4$$
$\text{true}$
$$\frac{8}{5}-\frac{2\left(-6\right)}{5}=4$$
$$\frac{8}{5}-\frac{-12}{5}=4$$
$$\frac{8}{5}-\left(-\frac{12}{5}\right)=4$$
$$\frac{8}{5}+\frac{12}{5}=4$$
$$\frac{8+12}{5}=4$$
$$\frac{20}{5}=4$$
$$4=4$$
$$\text{true}$$
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