Question 723297
The liters of acid never changes
{{{ .75*40 = 30 }}} liters of acid
Let {{{ w }}} = liters of water to be added
{{{ 30 / ( 40 + w ) = .6 }}}
{{{ 30 = .6*( 40 + w ) }}}
{{{ 30 = 24 + .6w }}}
{{{ .6w = 6 }}}
{{{ w = 10 }}}
10 liters of water must be added