Question 1019874
Let {{{ n }}} = the number of bicycles the 
store must sell to break even
Costs = {{{ 2700 + 45n }}}
Income: {{{ 75n }}}
----------------
Make Costs = Income
{{{ 2700 + 45n = 75n }}}
{{{ 30n = 2700 }}}
{{{ n = 90 }}}
The store must sell 90 bicycles to break even