The area of a rectangle is calculated with this formula: Area = Length • Width. Given the area of the rectangle, we can substitute it in for “A” (area) in the formula, so that we can solve for the missing width value.
A = L • W [Area if Rectangle Formula]
A = 30cm^2 [Given]
(30) = (6) • W [Substitution Property of
Equality]
30 / 6 = 6 • W / 6 [Division Property of
Equality]
5 = W [Definition of Equality]
W = 5 [Symmetric P.O.E]
Therefore, the width of this rectangle is 5.
We can check this because A = 6 • 5 = 30cm^2
