Pre-Algebra Examples

 $\begin{array}{r} l = & x + 1 \\ w = & 4 x + 1 \end{array}$

Step 1

The perimeter of a rectangle is equal to the sum of all sides of the rectangle.

$l e n g t h + l e n g t h + w i d t h + w i d t h = 2 \cdot (l e n g t h) + 2 \cdot (w i d t h)$

Step 2

$2 \cdot 2 \cdot 4$

Step 3

Multiply $2 \cdot 2 \cdot 4$ .

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Step 3.1

Multiply $2$ by $2$ .

$4 \cdot 4$

Step 3.2

Multiply $4$ by $4$ .

$16$

$16 x + 1$