16a - 5b - (-6a - 15b) - (-4b)

= 16a - 5b + 6a + 15b + 4b
= 22a + 14b

thank you so much

To simplify the given expression:

16a - 5b - (-6a - 15b) - (-4b)

First, let's simplify the double negative by removing the negative sign in front of the expression inside the parentheses:

16a - 5b - (-6a - 15b) + 4b

Next, we will distribute the negative sign to each term within the parentheses:

16a - 5b + 6a + 15b + 4b

Now, let's collect like terms:

(16a + 6a) + (-5b + 15b + 4b)

Combine the terms with "a":

(16a + 6a) = 22a

Combine the terms with "b":

(-5b + 15b + 4b) = 14b

Now we can substitute the simplified expressions back into the original equation:

22a + 14b