Respuesta :

[tex]\huge \bf༆ Answer ༄[/tex]

The Correct choice among them is ~ B

[tex] \large \boxed{3x + 4 = 7}[/tex]

because it's a equation !

Answer:

3x + 4 = 7

Step-by-step explanation:

Equations contain an equal sign, but expressions only contain numbers and variables.