b.	Recognize that a symbol represents the same number throughout an equation or expression (e.g., Δ + Δ = 8; thus, Δ = 4). <br /> <br /> <img src="http://emed.nucenter.org:8171/2011-05-13/2.2b+Symbol+representation-posterimage.png" alt="http://emed.nucenter.org:8171/2011-05-13/2.2b+Symbol+representation-2.m4v" height="320" class="aligncenter posterimg" width="480" />

b. Recognize that a symbol represents the same number throughout an equation or expression (e.g., Δ + Δ = 8; thus, Δ = 4).

b.	Recognize that a symbol represents the same number throughout an equation or expression (e.g., Δ + Δ = 8; thus, Δ = 4). <br> <br> 

2.2b Symbol representation

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2.2b Symbol representation

2.2b Symbol representation

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