Two mixtures have the same percentage of an acid solution. The first mixture has 6 fluid ounces of solution with x fluid ounces of water. The second mixture has 3x fluid ounces of solution with 68 fluid ounces of water. Part A: Which equation will help find the correct value of x? Part B: How many fluid ounces of water are in the first mixture? Choose one answer for Part A and one answer for Part B. If necessary, round your answer to the nearest hundredths place.