Question 1105681
x of the 9% alcohol
3000-x of the 15% alcohol


{{{9x+15(3000-x)=12*3000}}}

-

{{{3x+5(3000-x)=4*3000}}}
{{{3x+5*3000-5x=4*3000}}}
{{{-2x=4*3000-5*3000}}}
{{{2x=3000}}}
{{{highlight(x=1500)}}}



<b>1500 gallons of EACH!</b>