Question 860798
{{{ .3*20 = 6 }}} = pounds of nuts in mix
Let {{{ x }}} = pounds of nuts to add to
make the mix 50% nuts
{{{ ( 6 + x ) / ( 20 + x ) = .5 }}}
{{{ 6 + x = .5*( 20 + x ) }}}
{{{ 6 + x = 10 + .5x }}}
{{{ .5x = 4 }}}
{{{ x = 8 }}}
8 pounds of nuts should be added
check:
{{{ ( 6 + x ) / ( 20 + x ) = .5 }}}
{{{ ( 6 + 8 ) / ( 20 + 8 ) = .5 }}}
{{{ 14 / 28 = .5 }}}
{{{ .5 = .5 }}}
OK