Simplify - 4 (-y v) - 4 (5v-y)

Expand the brackets. two negatives multiplied together make a positive and a positive and a negative multiplies together make a negative. so you would times everything in the first bracket by - 4 and everything in the second bracket by - 4 also because it also has a - 4 outside the bracket:

4y-4v-20v+4y