Which is TRUE?
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 + 1/2b is not an expression because 1/2 is a fraction.