[Video] Q4: The number of states that joined the united states between 1776 and 1849 is twice the number of states that joined between 1850 and 1900. if 30 states joined the united states between 1776 and 1849 and x states joined between 1850 and 1900, which of the following equations is true?

Explanation for Question 4 From the Math (No Calc) Section on the Official Sat Practice Test 3

So number four tells us that the number of states that joined the United States 2 between 1776 and 1849 is twice the number between 3 1850 and 1800. So why don't we go ahead, 4 we'll call this number a, we'll call this number B, 5 right? And so it's telling us here that a is two times the 6 number that joined and B right? So a is two times speed. 7 And then we say if 30 states joined the, 8 uh, United States between 70 17, 76 and 17 or 1849. 9 So essentially that just told us that age is 30. 10 So I'll rewrite it so that we have AEs 30 and X states joined 11 between 18, 15, uh, 1900. 12 So now they told me that that was an X. 13 So I'm going to change my variable here to just say X, 14 instead of being not a big change. Um, 15 what is the, which of the following equations must be true? 16 Right? And so if we look here, we see that we've got 30 is 17 equal to two X, which shows up right here and answer choice B. 18 So the best way to go about making this equation, 19 it's just to read through the problem, come up with little pieces as you 20 go. And then from there, 21 you'll see it show up in our answer choice.