We can evaluate an algebraic expression for different values of the variable.
To evaluate 3x + 1 for x = −2, we substitute −2 in place of x
3(−2) + 1 = −6 + 1 = −5
Remember to use order of operations to evaluate and be careful with the minus signs.
Basic Mathematics & Algebra : Substituting Values Into an Algebraic Expression
Substituting values into an algebraic expression in mathematics is easier to do if the numbers the values represent are given ahead of time.
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