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<a accesskey="1" href="page.php?w=equation&amp;p=1">1.Previous</a><br />
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<p>an équation is defined as containing one or more <a href="page.php?w=variable_%28mathematics%29">variables</a>, while in <a href="page.php?w=English_language">English</a>, any <a href="page.php?w=well-formed_formula">well-formed formula</a> consisting of two expressions related with an equals sign is an equation.</p>

<p><a href="page.php?w=Equation_solving">Solving an equation</a> containing variables consists of determining which values of the variables make the equality true. The variables for which the equation has to be solved are also</p><p>
<a accesskey="1" href="page.php?w=equation&amp;p=1">1.Previous</a><br />
<a accesskey="3" href="page.php?w=equation&amp;p=3">3.Next</a>
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