Question

4x4

Bonus:
Tira is designing a rectangular room. She wants the room
to be 20 feet wide. What length must the room be if she
needs a perimeter of 60 feet?
a) Write an equation for Tira to find the length of the
room x. (remember, perimeter is the sum of all of the sides!!)
equation:
b) Solve for the length of the room x.

Answer 1

60=2(20)+2x

x=10

Explanation:

First, let's write some equations. I wrote 60=2(20)+2x, where x is the length of the room. To solve, first multiply 2 times 20 for 40 (60=40+2x). Then, I subtracted 40 from both sides (20=2x). Finally, I divided on both sides by 2 (10=x).