Pre-Algebra Examples

 $\begin{array}{r} l = & 10 \\ w = & r \end{array}$

Step 1

The area of a rectangle is equal to the length times the width.

$(l e n g t h) \cdot (w i d t h)$

Step 2

Substitute the values of the length $l = 10$ and width $w = r$ into the formula for the area of a rectangle.

$10 r$