If the length L of a rectangle is 3 meters more than twice its width and its perimeter is 300 meters, which of the following equations could be used to find L?
You have two equations to work with, the equation that describes the perimeter of the rectangle and the equation that describes the relationship between its length,
The perimeter of a reactangle is always equal to
In your case, you have
Now, you know that if you double the width and add three meters to the result, you get
You now have a system of two equations
Use the value of
This means that
The rectangle will thus be 49 m wide and 101 m long.