Question 838744
Let {{{ W }}} = his current weight
Let {{{ n }}} = number of weeks since he 
weighed 250 pounds
----------------------
{{{ W = -1.75n + 250 }}}
----------------------
Let {{{ W = 195 }}}
{{{ 195 = -1.75n + 250 }}}
{{{ 1.75n = 55 }}}
{{{ n = 55/1.75 }}}
{{{ n = 31.429 }}}
He will weigh less than 195 pounds
sometime during the 31st week