Try another version of this question A chemist creates `220` milliliters of a `37.5 %` alcohol solution by combining a `25 %` alcohol solution with a `50 %` alcohol solution. If `x` represents the amount of the `25 %` alcohol solution used and `y` represents the amount of the `50 %` alcohol solution used, which of the following could be used to model the given information? Box 1: Select the best answer
`{(x,+,y,=,220),(0.25x,+,0.5y,=,82.5):}`