Question

In the context of algebra, what is the primary definition of 'substitution'?

Options

• Combining like terms to simplify an expression

• Removing all operation signs from an expression

• Replacing variables with specific numerical values

• Isolating a variable on one side of an equation

Answer 1

Replacing variables with specific numerical values

Explanation:

Substitution is fundamentally defined as the process of replacing a variable (letter) with a known number to evaluate an expression.