Question 519460
Let {{{ p }}} = cover price
Let {{{ t }}} = tax included
(1) {{{ 21.56 - t = p - .2p }}}
(2) {{{ t = .08*( p - .2p) }}}
(2) {{{ t = .08*.8p }}}
(2) {{{ t = .064p }}}
By substitution:
(1) {{{ 21.56 - .064p = .8p }}}
(1) {{{ .864p = 21.56 }}}
(1) {{{ p = 24.95 }}}
cover price is $24.95
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check:
with 20% off:
{{{ 19.96 }}}
plus 8% tax:
{{{ 21.56 }}}
OK