Respuesta :

The answer is 5. Because we subtract 5 from both sides, subtract from 5 from 20 to get 15, divide both sides by 3 and then divide 15 by 3 to get 5z

Answer:

w = 5

Step by step explanation:

5 + 3 (w) = 20

first do 3 times what = 15

now its 5 + 15 = 20

so w = 5