00:03
All right, we've got a 10 -foot -long wall.
00:06
We've got two posters, whatever, that we're hanging on there.
00:11
And we want to know how far apart should they be so that each of these distances is the same, so that each of those is x, despite my picture.
00:20
So we could kind of set this up as an algebraic equation because, well, i know that the entire length is 10.
00:27
And what is that made up of? well, it's made up of x plus 1 and a quarter plus x.
00:33
Plus another one and a quarter plus another x.
00:37
So the total is 3x plus, and if we add 1 in a quarter plus 1 in a quarter, that's going to be 2 .5.
00:44
So 2 .5.
00:45
All right.
00:46
So that's the equation that we can now solve.
00:49
So how do we solve that? we're going to subtract 2 .5 feet from both sides.
00:55
10 minus 2 would be 8, but also have a half to subtract.
00:59
So i'm going to get 7 .5 feet is equal to.
01:03
Three times x so now i have to divide by three so i have that 7 .5 divided by three and well you know we could kind of look at this in a couple of different ways we could change it all into inches and then kind of come back and that might be the easiest way for us to do this so that we don't really worry so much about our decimals and trying to worry about that so we're at 7 .5 feet all right, so seven feet, we know what we have to do is just multiply that by 12 to figure out how many inches it is.
01:43
So that's going to be 84 inches.
01:45
And then i have that other half of a foot, which is going to be another six inches...