Michelle and her brother are planning a holiday. They decide to invite three friends to join them. The plane tickets cost 105$ each way, and bus tickets cost 12 each way. If each traveller puts in 600$, how much money will be left over altogether to spend on the holidays. Also what is the explanation to working this question out.

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