Explanation for Question 18 From the Math (No Calc) Section on the 2018 May Sat
Question 18 asks what value of X satisfies the equation above. 2 So to solve this problem, I'm going to start by cross multiplying. 3 So X minus eight times negative one is equal to one times X 4 minus nine. So I'm going to write that down here, 5 X minus nine is equal to negative one times X minus eight, 6 which is also equal to X minus nine is equal to negative X 7 plus eight. And now I'm going to add nine to both sides and add 8 X to outsides. And I get to X is equal to 9 seven T or when you divide both sides by two X 10 is equal to 8.5, 11 which is the correct answer to this question.