00:01
My goal is to decide if they are equivalent equations.
00:05
In the first one, i'm trying to decide if these two are equivalent.
00:10
Well, if i do the opposite operation on both sides, it keeps it balanced, and i would get the exact same equation as the second part.
00:20
So, yes, these are equivalent.
00:22
I'm going to do the same thing a different way for part.
00:25
Well, let's do part b.
00:27
So part b is, and the second equation is that.
00:33
I'm going to show this by substitution.
00:35
So the other thing you could do is substitute this in and see if it gives you a balanced equation.
00:41
So if i substitute this in, i would get 10 minus a negative 5 equals 5, which is 10 plus 5, which is 15 equals 5.
00:51
So this is not equivalent...