0:00:00.012,0:00:04.700 Starting with this first equations up[br]here, we see that we have 3x+4 equals 0:00:04.712,0:00:10.075 smiley face. 3x has a 3 in it, but this is[br]multiplied by x. A term like this, even 0:00:10.087,0:00:15.725 though there is a number in it, is called[br]a variable term. Because its whole value 0:00:15.837,0:00:20.565 is going to change or vary depending on[br]what number we plug in for x. This is 0:00:20.577,0:00:25.406 definitely a variable term, 4 is just a[br]number so no check there and finally, we 0:00:24.841,0:00:29.971 have a smiley space. That means, it must[br]be a variable. And we can go through the 0:00:29.983,0:00:34.875 other three equations in the same way[br]turn-by-turn to figure out what should be 0:00:35.032,0:00:38.670 checked. And know that there are some[br]things down here that we haven't talked 0:00:38.682,0:00:42.520 explicitly about yet, and that might have[br]thrown you off. Like, we have a fraction 0:00:42.532,0:00:46.095 right here and we have a couple of[br]expononents, but we'll get to those things 0:00:46.107,0:00:49.320 pretty soon. And understanding the[br]difference between variable and 0:00:49.332,0:00:53.345 nonvariable terms is really important for[br]understanding everything that we're going 0:00:53.357,0:00:56.770 to do in Algebra. That means we're off to[br]a great start in developing our 0:00:56.782,0:00:57.295 foundation.