Question 660160
Let {{{ r }}} = rate that $1500 is invested at
{{{ r + .005 }}} = rate that $2000 is invested at
given:
{{{ 1500r + 2000*( r + .005 ) = 255 }}}
{{{ 1500r + 2000r + 10 = 255 }}}
{{{ 3500r = 245 }}}
{{{ r = 245 / 3500 }}}
{{{ r = .07 }}}
$1500 is invested at 7%
check:
{{{ 1500r + 2000*( r + .005 ) = 255 }}}
{{{ 1500*.07 + 2000*.075 = 255 }}}
{{{ 105 + 150 = 255 }}}
{{{ 255 = 255 }}}
OK