Question 1090336
<pre>
                 VOLUME       ALCOHOL

40% Alcohol       x           0.6x

10% Alcohol      10-x         0.10(10-x)

MIXTURE          10           0.6x+0.10(10-x)
</pre>
{{{(0.6x+0.1(10-x))/10=0.4}}}

{{{0.6x+1-0.1x=0.4*10}}}

{{{6x+10-x=40}}}

{{{5x=30}}}

{{{highlight(x=6)}}}-----gallons of the 60%
{{{highlight(4)}}}-------gallons of the 10%