The perimeter of the rectangle is 36 cm, find the width if you know that the length = 13 cm.

To answer the question of the problem – to find the width of the rectangle, we will compose and solve a linear equation.

And we will start by considering what we know from the problem statement. It says that the perimeter of the rectangle is 36 cm.And it is also known that its length is 13 cm.

Let’s start with the fact that we denote the width of the rectangle using the variable x cm.

Let’s remember the formula for finding the perimeter:

P = 2 (a + b);

2 (x + 13) = 36;

x + 13 = 36: 2;

x + 13 = 18;

x = 18 – 13;

x = 5 cm of the width of the rectangle.