The following rectangle has a length of 6 centimeters and an unknown width. If the
perimeter is 21 centimeters, what is the width of the rectangle? Set up an equation, and solve.

Respuesta :

Answer:

The width is 4.5 cm

Step-by-step explanation:

w + w+ 6 + 6 = 21  Combine like terms

2w + 12 = 21  Subtract 12 from both sides

2w = 9  Divide both sides by 2

w = 4.5