Question

You need a 50% alcohol solution. On hand, you have a 195 mL of a 30% alcohol mixture. You also have 65% alcohol mixture. How much of the 65% mixture will you need to add to obtain the desired solution?

Answer 1

Let x = the amount to add to the 30% solution
.30(195)+.65x=.50(195+x)

Answer 2

@ctheowl Can you solve it now?