Answer:
b
Step-by-step explanation:
39-26 = ?
39
-26
____
13
you added 13 songs.
Answer:
The other point is 
Step-by-step explanation:

Best Regards!
Answer:
A) x = 0, 2
Step-by-step explanation:
(x + 4) / 6x = 1 / x
this is a proportion, so you can cross-multiply and get:
x(x + 4) = 6x
x² + 4x = 6x
x² - 2x = 0
x(x - 2) = 0
x = 0
x - 2 = 0 so, x = 2