Explanation for Question 3 From the Math (Calc) Section on the 2018 May Sat
Question three says if 10 equals two X plus 14, 2 which of the following must be true? So 10 is equal to two X 3 plus 14. So I'm going to solve for two X by subtracting 14 4 from both sides. And that gives me negative four is equal to two X. 5 So that tells me that if I multiply the right side of the equation 6 by a positive number, as all of these do, 7 then I should have a negative number on the left side. 8 So from that I can eliminate answer choices a and B, 9 because they both have positive numbers on the right side. 10 Now I'm going to multiply this right side of the equation to 11 make it match this side of the equation. Just to see if that matches 12 up. So first I'm going to multiply both sides of the equation by four 13 to get eight X is equal to negative 16. 14 And this does work that's correct. Which means that C is the correct answer.