Granny needs 3 gallons of 15% vinegar for her pickles. Bud went to the store and bought 2 gallons of 50% vinegar. Granny asks: How much pure spring water must I mix with some of that 50% stuff to get my cantaner filled with 3 gallons of 15% solution?
[first mixture] + [second mixture] = [total mixture]
[3(0.15)] + [x(0.50)] = [(x + 3)(0.15)]
Is this the correct equation and set up?