Generally, a numerical value is assigned in equations with variables or in mathematical expressions that include variables.

**The assignment involves changing the variables in a mathematical expression or equation to specific numerical values.**

**For example**

$X=3$

$Y=2$

$Z=\text{?}$

$X^2+Y=Z$

$3^2+2=11$

**Answer:** $Z=11$

By assigning the numerical value, the general form becomes a particular case.