Explanation for Question 1 From the Math (Calc) Section on the 2019 April Sat
For a number one, we are looking for the value of X that satisfies 2 the equation. So we are just going to solve for X. 3 So the first step would be to distribute this left side so that it 4 would give me five X minus 15 is equal to 5 10 X plus five. And now to solve, 6 we can subtract five X from both sides to give you 7 negative 15 is equal to five X plus five, 8 and then subtracting five from both sides gives you negative 9 20 is equal to five X, 10 then dividing both sides by five gives you a negative four 11 is equal to X, which is a.