Explanation for Question 4 From the Math (No Calc) Section on the 2018 May Sat
Question four reads in the equation above a, 2 B and C are constants. If the equation has infinitely many solutions, 3 which of the following must be equal to C. So we're going to start 4 by distributing and we're going to rewrite this as two X plus two B 5 is equal to a ax plus C. 6 Now, according to this problem, this equation has infinitely many solutions 7 for an equation to have infinitely many solutions. 8 It has to be the same on both sides, 9 which means that two X is equal to AIX. 10 And two B is equal to C, 11 but equations have to be exactly the same. 12 So from that, we know that C is equal to two B.