<PRE><B>Question 1129873</B>
The question looks familiar and was maybe done already not more than a week ago.



x, amount of the 55% HCl
465-x, liters amount of the 25% HCl

{{{55x+25(465-x)=45*465}}}

-

{{{55x-25x+25*465=45*465}}}

{{{30x=45*465-25*465}}}

{{{30x=20*465}}}

{{{x=(2/3)465}}}

{{{x=310}}}


310 liters of the 55% HCl
and
155 liters of the 25% HCl</PRE>