Question 617492
Let {{{ w }}} = ml of water to be added
given:
{{{ .16*24 = 3.84 }}} ml alcohol in 16% solution
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{{{ 3.84 / ( w + 24 ) = .12 }}}
{{{ 3.84 = .12*( w + 24 ) }}}
{{{ 3.84 = .12w + 2.88 }}}
{{{ .12w = 3.84 - 2.88 }}}
{{{ .12w = .96 }}}
{{{ w = 8 }}}
8 ml of water must be added
check:
{{{ 3.84 / ( w + 24 ) = .12 }}}
{{{ 3.84 / ( 8 + 24 ) = .12 }}}
{{{ 3.84 / 32 = .12 }}}
{{{ 3.84 = 3.84 }}}
OK