Question

The area of a rectangle is 1,176 square meters. The width of the rectangle is 21 meters. What is the length of the rectangle?

Answer 1

The answer to your question is 56.
If the area is 1176 and the width is 21 then there is just a single variable the length.

1176=21x

Solve this to get 56.

Answer 2

176m2 = (21m)(x)

1,176m2
----------- = x
21m

56m = x
(1 of the meters (m) cancel our leaving one m for unit to answer.)