Rashida is building a model of her city's downtown area. She is constructing part of an office building, as shown below. Each cube has an edge length of foot. Based on the model, the length of the building is foot. The width of the model building is foot. The height of the model building is foot. The volume of the model building is cubic foot.

Given the system of equations presented here: 2x + 4y = 14 4x + y = 20 which of the following actions creates an equivalent system such that, when combined with the other equation, one of the variables is eliminated? multiply the second equation by â’4 to get â’16x â’ 4y = â’80 multiply the second equation by â’1 to get â’4x â’ y = â’20 multiply the first equation by 2 to get 4x + 8y = 28 multiply the first equation by â’1 to get â’2x â’ 4y = â’14