equation - mathematical statement consisting of an equal symbol between two algebraic expressions that have the same value, solution - value, or values, that can be put in the place of a variable (such as n) that makes the equation true, one solution - there is only one solution that can make both sides of the equation equal, no solution - no number can replace the variables to make both sides of the equation equal, infinite solutions - any number can replace the variables to make both sides of the equaion equal, variable - a symbol or letter that represents one or more number,

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