### Home > MC1 > Chapter 7 > Lesson 7.2.4 > Problem 7-83

7-83.

Consider the diagram of three pieces of lumber shown below.

If

meters, how long are all three pieces of lumber laid end to end?Since

meters, the three pieces of lumber now look like this:Can you find the total length of the lumber pieces?

If the total length of all three pieces laid end to end is

meters, what is the value of ?

Using the diagram above, can you write an expression to represent the pieces of lumber?If

why must ?Can you find the value of

?