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Unformatted text preview: tion in x is an equation of the form ax + b = 0
for some ﬁxed real numbers a and b .
1 7x − 5 is a linear expression. 2 7x − 5 = 0 is a linear equation. Outline Linear Equations Equations in More Than One Variable Solutions of Equations A solution of an equation in x is a value of x that makes the
To solve an equation is to ﬁnd all solutions of the equation.
Two equations are equivalent if they have the same set of
One solution of 7x − 5 = 0 is x = .
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