Exercise 2 Page 210

Before we can solve this equation, we need to isolate the absolute value expression using the Properties of Equality.

An absolute value measures an expression's distance from a midpoint on a number line.

|n|= 7 This equation means that the distance is 7, either in the positive direction or the negative direction. |n|= 7 ⇒ ln= 7 n= -7 In this case, our absolute value expression is only the variable n, so our equivalent pair of linear equations does not need any more simplifying. Now, let's graph these solutions on a number line.