Can someone help me with this problem. I came out with the answer of 7.8 ounces needed. I used x =15% solution and y = 35% solution. I just don't know for sure if I did it right. The problem is:
A 15% acid solution is to be mixed with a 35% acid solution to produce 12 ounces of a 22% acid solution. How much of the 15% acid solution is needed? Let x = ____ Let y = ____ Thank you.