00:01
All right, for this problem, we are being asked to calculate the speed of a person who was given a fine for speeding in massachusetts.
00:14
And they give us the formula f equals 10 times the quantity x minus 65 plus 50.
00:23
And we are told that f is the cost of the fine and x is the speed of the person driving.
00:38
And they want us to find out how much the fine is, or how fast, sorry, the question that we're being asked is, how fast were they going if the fine is equal to $250.
01:07
So we're going to take the $250 and put it in place of f.
01:15
So we have the equation 250 is equal to 10 times the quantity x minus 65 plus 50.
01:25
And we're going to solve this equation for x.
01:28
So our first step is we need, or the first thing we need to do is we need to simplify that entire right -hand side.
01:34
So we're going to distribute the 10 and gives us 10x minus 650 and then we have this plus 50...