A rectangle's width is twice as long as its length. if the perimeter is 36 in., find its area

72 square inches.

Step-by-step explanation:

Step 1:

First, you have to set up an equation:

Perimeter: 2x + 2x + x + x = 36

Step 2:

Then, you have to find out what x is. To find out faster, simplify the equation by combining like terms:

2x + 2x + x + x = 6x

Step 3:

Next, find x:

6x = 36

36/6 = 6

Step 4:

Finally, find the value that is twice as big as 6 and then multiply the two numbers together.

6*2 = 12

12*6 = 72