Which is TRUE?

Question

Responses
A 7a + 3b is an equation because it has variables.7a + 3b is an equation because it has variables.
B 15a + 5 is an equation because it can be solved.15a + 5 is an equation because it can be solved.
C 9a = 20 is an equation because it has an equal sign.9a = 20 is an equation because it has an equal sign.
D 6a +

b is not an expression because

is a fraction.6a + 1 2 b is not an expression because 1 2 is a fraction.

Answer 1

C 9a = 20 is an equation because it has an equal sign.