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To find the numerical value of an expression.


A value for the variable that makes an equation true.
For x + 17 = 19, the value is 12


A set of ordered pairs.

algebraic expression

An expressions that contains sums and/or products of variables and numbers.

ordered pair

A pair of numbers used to locate any point on a coordinate plane.


A placeholder for any value.


An example that shows a conjecture is not true.


A mathematical sentence that contains an equal sign (=).


The point at which the number lines intersect in a coordinate system.

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