Question 626019
Let {{{ c }}} = number of cheeseburgers sold
Let {{{ h }}} = number of hamburgers sold
given:
(1) {{{ c + h = 700 }}}
(2) {{{ c = h + 50 }}}
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(2) {{{ c - h = 50 }}}
Now add (1) and (2)
(1) {{{ c + h = 700 }}}
(2) {{{ c - h = 50 }}}
{{{ 2c = 750 }}}
{{{ c = 375 }}}
and
(1) {{{ c + h = 700 }}}
(1) {{{ 375 + h = 700 }}}
(1) {{{ h = 700 - 375 }}}
(1) {{{ h = 325 }}}
325 hamburgers were sold on tuesday
check:
50 more cheeseburgers than hamburgers? yes
{{{ 375 + 325 = 700 }}} ? yes