Re: An instructor scored a student's test of 50 questions by

If we let X equal the number of answers that are correct and W equal the number of answers that are incorrect, then we can create the following equations: X + W = 50 W = 50 - X and X - 2W = 38 When we make this exchange, we get: X - 2(50 - X) = 38 X - 100 + 2X = 38 3X = 138 X = 46 Great setup! Just...