Question

Name the property illustrated by each equation.

$4x+0=4x$

Short answer

Name of the property illustrated is Additive Identity.

Step-by-step solution

- Write properties of real numbers 

Properties of real numbers are written in following table:

For any real numbers a, b, and c:
Property	Addition	Multiplication
Commutative	a+b=b+a	$a·b=b·a$
Associative	$\left(a+b\right)+c=a+\left(b+c\right)$	$\left(a·b\right)·c=a·\left(b·c\right)$
Identity	a+0=a=0+a	$a·1=a=1·a$
Inverse	$a+\left(-a\right)=0=\left(-a\right)+a$	If $a\ne 0$, then $a·\frac{1}{a}=1=\frac{1}{a}·a$
Distributive	$a\left(b+c\right)=ab+ac\text{and}\left(b+c\right)a=ba+ca$

- Substitution in given values

Substitute a for in given equation.

Now equation becomes $a+0=a$

- Identify the property

From the table of properties of real numbers, $a+0=a$ is the property of identity in addition

Thus, additive identity is illustrated by given equation.