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Least common multiple of two monomials

Shows how to create the simplest expression both of the given ones divide into.

From  Tom Grant 10 plays 0  

Introduction to solving an equation with parentheses

Two simple examples of how to deal with parentheses in equations.

From  Tom Grant 24 plays 0  

Additive property of equality with signed fractions

Adding the same fraction to both sides so the variable is left by itself

From  Tom Grant 54 plays 0