Pattern, a repeated design or recurring sequence, Constant, a quantity having a fixed value, that does not change, Expression, one or a group of terms, Equation, a mathematical statement containing an equals sign, Sequence, an ordered set of numbers or shapes, arranged according to a rule, Variable, a quantity that can change or vary, taking on different values, Formula, a mathematical rule written using symbols, usually as an equation describing a relationship between quantities, Unknown, a variable representing an unknown quantity, Term, one of the numbers in a sequence, Substitution, putting values where the letters are

Algebra

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