Declaring Variables

In this video we will be learning how to declare variables in word problems.

For example:

The length of a rectangle is 5 units longer than the width. If the perimeter is 22 units, how long is the width?

Let $w = width$

Let $w + 5 = length$

Perimeter Formula: $P=2l+2w$

$w + w + w + 5 + w + 5 = 22$ $w = 3$
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Used by students across the country. Pre-Algebra, Algebra I, Geometry, & Algebra II