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i dont know but i be ballin all night though

$8d-25=3d$

$8d-25+25=3d+25$

$8d-0=3d+25$

$8d=3d+25$

$8d-3d=3d+25-3d$

$5d=3d+25-3d$

$5d=25-0d$

$5d=25-0$

$5d=25$

$\frac{5d}{5}=\frac{25}{5}$

$1d=\frac{25}{5}$

$d=\frac{25}{5}$

$d=5$