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{{ printedBook.courseTrack.name }} {{ printedBook.name }} A coefficient is a number that stands in front of a variable, an expression, or a function. Below is an algebraic expression where the terms containing variables have the coefficients $2$ and $-5.$

Coefficients indicate how many times a particular variable appears in an expression. In this case, there are two $x_{3}-terms$ and five $x-terms.$ $2(x_{3}+x_{3}) −5(x+x+x+x+x) +3 $ Note that a variable with a coefficient of $1$ is usually written as though it doesn't have a coefficient. $1a=a $