Question 1072094
x gallons of the 40%
40-x gallons of the 80%
{{{(40x+80(40-x))/40=50}}}


{{{(4x+8(40-x))/40=5}}}


{{{(x+2(40-x))/10=5}}}



<a href="https://www.youtube.com/watch?v=-REjxT9KCzQ">two-part mixture, find amounts of both parts - example</a>