the perimeter of a rectangle is 12cm, the width is xcm. write an expression for the length of the rectangle

Question

perimeter - 12cm

width - xcm

find an expression for the length of the rectangle.

Answer 1

Hi Rhys,

 

Let's begin by writing the Perimeter formula for a rectangle:

    Perimeter = (2 x length) + (2 x width)

 

Next, let's plug in our given values into this formula:

   12 = (2 x length) + 2x

 

Finally, let's solve for our length expression:

   2 x length = 12 - 2x

   length = (12 - 2x)/2

   length = 6-x cm. 

 

Thanks for submitting this problem and glad to help.

 

God bless, Jordan.