Question 964262
Let {{{ c }}} = Mr Chen's cost
(1) {{{ c + .2c = 360 }}}
(1) {{{ 1.2c = 360 }}}
(1) {{{ c = 300 }}}
------------------------
Let {{{ b }}} = Mr Lin's cost
(2) {{{ b + .25b = 300 }}}
(2) {{{ 1.25b = 300 }}}
(2) {{{ b = 240 }}}
Mr Lin paid $240 for th article