Which of the following properties would NOT be used to justify any of the steps in solving the equation below?
72n=3n+4
2(72n)=2(3n+4)
7n=6n+8
7n−6n=6n+8−6n
n=8
A.Subtraction Property of Equality
B.Multiplication Property of Equality
C.Distributive Property
D.Zero Product Property

Respuesta :

Given:

The equation is

[tex]\dfrac{7}{2}n=3n+4[/tex]

To find:

The properties which is not used from the given options.

Solution:

We have,

[tex]\dfrac{7}{2}n=3n+4[/tex]

Using Multiplication Property of Equality, multiply both sides by 2.

[tex]2(\dfrac{7}{2}n)=2(3n+4)[/tex]

[tex]7n=6n+8[/tex]                    (Distributive Property)

Using Subtraction Property of Equality, subtract 6n from both sides.

[tex]7n-6n=6n+8-6n[/tex]

[tex]n=8[/tex]

From the given options only one property is not used, i.e., Zero Product Property.

Therefore, the correct option is D.