00:01
Okay, our next problem, we have xy minus 1 equals 0.
00:08
And we have 2x minus 4y plus 7 equals 0.
00:21
Now this one i think lends itself well to graphing.
00:24
Just because we have two different types of equations, we're going to have a linear equation here on the bottom.
00:31
And then we're going to have an inverse x equation on top.
00:34
And so because we just have a lot of going on here, i'm just going to go ahead and solve it by graphing.
00:41
So the first thing we need to do is get them written in y equals form.
00:44
So for the first form, i'm going to add one to both sides, then divide by x.
00:49
So y equals 1 over x.
00:53
For the second equation, we need to subtract 7 and subtract 2x and then divide by negative 4.
01:01
So y is going to equal 1 half x.
01:07
And then negative 7 divided by negative 4 is just positive 7 over 4...