substitution
Substitution
When you replace a variable with a quantity, it is called a substitution.
The term for replacing a variable with another value or expression is "substitution."
Evaluating the expression.
I think it is called "replacing" or "substitution".
That is sometimes known as EVALUATING the expression.
Substituting.
X+6. Variable (x)
That is called 'solving'.
A numerical or constant quantity placed before and multiplying the variable in an algebraic expression (e.g., 4 in 4xy).
In the expression (8 + 2t), the variable is (t). A variable is a symbol used to represent an unknown quantity, and in this case, (t) can take on different values. The expression combines a constant term (8) and a term that includes the variable multiplied by a coefficient (2).
A mathematical phrase that includes a variable is an algebraic expression, such as ( 3x + 5 ). In this expression, ( x ) is the variable, representing an unknown value that can change. The expression combines constants (like 3 and 5) with the variable to denote a quantity that can vary based on the value of ( x ).