you already have the solution from John, just an additional piece of advice:
always separate the x on one side and the numbers on the other side of these problems. Here: -3 + x < .... means you could for example add +3 on both sides. On the left side is now just x. On the right...
Keysha, are you looking for a solution / answer? Right now it's just an equation, so nothing to justify yet...?
You need to move the x's to one side and the numbers to the other. There are always several ways to do this.
13x - 18 = -5x + 36 [now add 18 on both sides]
you will need both the binomial formula here and the "complete the square" step to transform your equation. The expression on the left happens to be a perfect binomial already and you can transform it to its basic expression being (x-3/2)^2.
Now the only way that this expression...