Question 993090
Let y be the amount of the 60% lavander.
Total volume of the resulting mixture is  y+70.


{{{(80*70+60*y)/(y+70)=74}}}



<a href="http://www.algebra.com/my/Two-Part-Mixture-with-one-material-quantity-unknown.lesson?content_action=show_dev">LESSON: Mixture: one material quantity unknown </a>