Respuesta :

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To evaluate a variable expression, you must "substitute" values for the variable, and then calculate the result.
While solving equations, we try hit and trial method. in this method we use different possible solutions, solve the equation to see if it is working out or not. The roots that we try substituing are totaly based on guess.

Answer:

To evaluate a variable expression, you must substitute values for the variable, and then calculate the result.

Step-by-step explanation:

Evaluation of an algebraic expression basically means that we have to substitute a number in place of the variable to perform the arithmetic operations and then solve the algebraic expression to obtain the desired result.

Hence, the answer in place of the blank  is:

Substitute.

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