What are equivalent to

5x - 15 - 20x + 10

-5 (3 x + 1)

Step-by-step explanation:

Simplify the following:

5 x - 20 x - 15 + 10

Grouping like terms, 5 x - 20 x - 15 + 10 = (5 x - 20 x) + (10 - 15):

(5 x - 20 x) + (10 - 15)

5 x - 20 x = - 15 x:

-15 x + (10 - 15)

10 - 15 = - 5:

-5 - 15 x

Factor - 5 out of - 15 x - 5:

Answer: - 5 (3 x + 1)