A researcher is working with two types of nutrient solutions, Solution A and Solution B, containing both essential minerals and water. When 3 litres of Solution A and 7 litres of Solution B are mixed, the resulting mixture contains 25% essential minerals. Similarly, when 6 litres of Solution A and 4 litres of Solution B are mixed, the resulting mixture contains 22% essential minerals. In which atio should the researcher mix Solutions A and B to create a new mixture with 23% essential minerals?