The perimeter is 24 inches. a poster is 3 times as long as it is wide. what are the length and width of the poster.

24=3x+3x+x+x add like terms

24=8x divide by 8

3:x

plug I'm 3 for x

3*3=9 so length is 9

and width is 3

In this question the main information's are already provided. Based on them the answer to the question can be easily deduced.

Let us assume the width of the poster = x

Then the length of the rectangle = 3x

The perimeter of the rectangle = 24 inches

we already know

Perimeter = 2 (Length + width)

24 = 2 (3x + x)

24 = 2 * 4x

24 = 8x

x = 24/8

= 3

So the width of the rectangle is 3 inches

Length of the rectangle = 3x

= 3 * 3

= 9

So the length of the rectangle is 9 inches.