<PRE><B>Question 1100888</B>
Let the masses of each be A grams of liquid A and B grams of liquid B.
Density for A is 3 grams per ml.
Density for B is 4 grams per ml.
1 ml. is 1 cm^3.


Volume for the mixture is  {{{A/3+B/4=1000}}}.

Mass for the mixture is  {{{A+B=3600}}}, in grams.


The system of equations for this is  {{{system(A/3+B/4=1000,A+B=3600)}}}, and best to start by simplifying the volume equation.


{{{4A+3B=12000}}}
-
{{{4A+3(3600-A)=12000}}}
{{{4A+3*3600-3A=12000}}}
{{{A=12000-3*3600}}}
{{{highlight(A=1200*grams)}}}--------{{{which_is}}}{{{highlight(400*cm^3)}}} of liquid A.
Now use this to evaluate the value of B.</PRE>