Use the menu below to learn, practice, and master the skills you need to understand Equations and Substitution!

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Equations are mathematical sentences that have an equals sign.
The equals sign shows you that the quantities on either side are equal in value.

5a + 3	= 23, when a = 4
5 * 4 + 3	= 23
20 + 3	= 23
23	= 23
5a + 3	= 23, when a = 4 is TRUE

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