Question 723969
Let {{{ x }}} = amount to be invested @ 11%
given:
{{{ .08*2000 + .11x = .1*( 2000 + x ) }}}
{{{ 160 + .11x = 200 + .1x }}}
{{{ .01x = 40 }}}
{{{ x = 4000 }}}
$4,000 must be invested @ 11%
check:
{{{ .11*4000 = 440 }}}
{{{ .08*2000 = 160 }}}
{{{ 440 + 160 = 600 }}}
{{{  600 / ( 4000 + 2000 ) = 600/6000 }}}
{{{ 600/6000 = .1 }}}
OK