00:01
In this problem, we're going to solve a two -step equation for the variable c.
00:05
In doing this, we're going to use the properties of subtraction, property of equality, and the division property of equality.
00:12
So let's go ahead and start by solving for the 7c.
00:15
We see this plus 4 here.
00:17
To undo that plus 4, we have to do the opposite and subtract 4.
00:21
We'll have to do this to both sides because of the subtraction property of equality.
00:25
This makes the equation stay true.
00:27
So the plus 4 and minus 4 cancel out.
00:30
All we have left is 7c equals 18 minus 4, which is 14.
00:37
So now we want to take care of this 7 times c and solve for the c.
00:41
To undo this time 7, we divide by 7...