## Algebra 1

$=\frac{2d}{5}$
$\frac{d}{5}-(-\frac{d}{5})\longrightarrow$ change subtraction to addition by changing the sign of the following term $=\frac{d}{5}+\frac{d}{5}\longrightarrow$ add the numerators of like fractions $=\frac{2d}{5}$