Question 1066341
x, how much pure acid to add


{{{(100x+20*6)/(x+6)=40}}}



<a href="https://www.algebra.com/my/Two-Part-Mixture-with-one-material-quantity-unknown.lesson?content_action=show_dev">two-part mixture if one part is known</a>
https://www.algebra.com/my/Two-Part-Mixture-with-one-material-quantity-unknown.lesson?content_action=show_dev



{{{(5x+6)/(x+6)=2}}}


{{{5x+6=2x+12}}}


{{{3x=6}}}


{{{highlight(x=2)}}}