00:01
In this problem, we're asked to do three things.
00:03
First, we're asked to define a variable.
00:06
Second, we're asked to write an equation to model a situation that they give us.
00:11
And third, we're asked to solve that equation.
00:14
So, what's a variable? a variable is a symbol that can denote any number, whether that number be 7, pi, or 5 .6.
00:28
Usually, variables are letters.
00:31
So in the case of this problem, we are going to use the letter x as a variable.
00:38
Moving on, the second part, they ask us to write an equation to model the situation when 25 is 10 less than a number.
00:50
Paying attention to the wording, a number, we realize that that is a variable, because a variable is any number...