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Solving a word problem with two unknowns using a linear equation.

This shows how to represent the two unknowns using their given relationship so that a linear equation can be written using one variable. Then that equation is solved to answer the question

From  Tom Grant 18 plays 0  

Introduction to simplifying a sum or difference of radical expressions: Univariate

Two examples of reducing radicals to then be able add or subtract like radicals

From  Tom Grant 6 plays 0