Question

Which of the following is not an expression?

Answer 1

Answer:

3x + 4 = 7

Step-by-step explanation:

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

Answer 2

$\huge \bf༆ Answer ༄$

The Correct choice among them is ~ B

$\large \boxed{3x + 4 = 7}$

because it's a equation !