Question 791434
Let {{{ p }}} = the original price
{{{ p - .25p }}} = the discounted price
{{{ p - .25p = .75p }}}
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{{{ .75p = 819 - .05*(.75p) }}}
{{{ .75p = 819 - .0375p }}}
{{{ .7875p = 819 }}}
{{{ p = 1040 }}} ( in cents )
The original price was $10.40
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check:
The discounted price was {{{ .75*10.4 }}}
{{{ .75*10.4 = 7.8 }}}
$7.80
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The 5% tax on this is
{{{ .05*7.8 = .39 }}}
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Discounted price + tax = 
{{{ 7.8 + .39 = 8.19 }}}
OK