Question 752132
{{{ .15*400 = 60 }}} ml of alcohol in 15% solution
{{{ ( 60 + x ) / ( 400 + x ) = .32 }}}
{{{ 60 + x = .32*( 400 + x ) }}}
{{{ 60 + x = 128 + .32x }}}
{{{ .68x = 68 }}}
{{{ x = 100 }}}
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check:
{{{ ( 60 + x ) / ( 400 + x ) = .32 }}}
{{{ ( 60 + 100 ) / ( 400 + 100 ) = .32 }}}
{{{ 160 / 500 = .32 }}}
{{{ 160 = 160 }}}
OK