This rectangle has a perimeter of 120

centimeters. If the width is 20 cm, what is

measure of the length?

20 cm

x cm

the measure of the length is 40cm.

Step-by-step explanation:

Formula: P=2L+2W

so 120=2L+2 (20)

we want the subject to be L

so 2L=120-40, because 2*20 is 40

and when you sending across the sign will change.

so 2L=80, than we divide both side by 2.

So 80:2=40,

therefore the answer is 40.