Question

A 20% acid solution is mixed with a 70% acid solution to get 100 liters of a 40% solution.

If x = amount of 20% solution and y = amount of 70% solution, then 0.2x + 0.7y = 70,90,20,or40 liters.

if x=40l & y=60l, then .2x+.7ywould equal 40;, right?

Answer 1

sounds right. This also takes care of x + y = 100.

Answer 2

okay, thanks, i just had to make sure,