I don't understand this

Question

Tonya built a sandbox that was 2x+1 long and x-3 wide. She wants to make another sandbox that is twice as wide and twice as long. What is the equation?

 

Answer 1

Using the given expressions as the two dimensions of an original sandbox, we can represent the dimensions of the enlarged sandbox as c respectively.

 

The area can be written as the equation A= width•length, using the above two expressions as the length & width.