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An *equation* is a statement that two
quantities are equal. A *variable* is a letter that represents an unknown value.
A *root* or *solution* of an equation is the value of the variable that makes the
equation a true statement.

x= 4 + 3 is anequation.xis thevariable. 7 is therootorsolution.

*Factors* are expressions of multiplication.

3

xmeans 3 timesx. 3 is a factor of 3x.xis a factor of 3x.

*Terms* are algebraic expressions that are added or subtracted.

In the expression 2

m+ 3n+ 8, 2mis atermand 3nis aterm. 8 is aterm.

*Constants* are terms that contain only numbers.

In 2

m+ 3n+ 8, theconstantterm is 8.

*Variable* terms are terms that have at least one letter.

In 5

a+ 3b+ 7, 5aand 3barevariableterms.

A *coefficient* is one factor as it relates to the remaining factors
of a term.

In 2

m+ 3n+ 8, 2 is thecoefficientofmand 3 is thecoefficientofn. 8 has no coefficient. The coefficients 2 and 3 are also called thenumerical coefficients.

This activity contains 5 questions.